diff --git a/.gitignore b/.gitignore
index 700d3a3..8f54720 100644
--- a/.gitignore
+++ b/.gitignore
@@ -130,6 +130,7 @@ celerybeat.pid
 # Environments
 .env
 .venv
+.pipcache/
 env/
 venv/
 ENV/
@@ -216,4 +217,4 @@ temp/
 *.backup
 
 # Docker override
-docker-compose.override.yml
\ No newline at end of file
+docker-compose.override.yml
diff --git a/backend/app/api/api_v1/endpoints/domains.py b/backend/app/api/api_v1/endpoints/domains.py
index 0607251..a6b64c1 100644
--- a/backend/app/api/api_v1/endpoints/domains.py
+++ b/backend/app/api/api_v1/endpoints/domains.py
@@ -9,9 +9,11 @@ from typing import Any, Dict, List, Optional
 from fastapi import APIRouter, Depends, HTTPException, Path, Query, status
 from fastapi.responses import Response
 from pydantic import BaseModel, Field
+from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import Session
 
 from app.core.database import get_db
+from app.core.security import require_admin_auth
 from app.models.domain import Domain
 from app.services.cloudflare_dns import (
     analyze_dns_records,
@@ -32,6 +34,7 @@ from app.services.report_persistence import (
     hydrate_report_store_from_db,
 )
 from app.services.report_store import ReportStore
+from app.utils.domain_validator import validate_domain_config
 
 logger = logging.getLogger(__name__)
 
@@ -55,6 +58,14 @@ class DomainResponse(DomainBase):
     compliance_rate: float = 0.0
 
 
+class DomainCreate(BaseModel):
+    """Payload for creating a monitored domain."""
+
+    name: str
+    description: Optional[str] = None
+    dkim_selectors: Optional[List[str]] = None
+
+
 class DomainStatsResponse(BaseModel):
     """Domain statistics for the domain details page"""
 
@@ -283,6 +294,22 @@ def _policy_enforcement_suggestions(
     return []
 
 
+def _normalize_domain_name(name: str) -> str:
+    return name.strip().strip(".").lower()
+
+
+def _domain_names_for_summary(db: Session, store: ReportStore) -> List[str]:
+    report_domains = store.get_domains()
+    stored_domains = [
+        name
+        for (name,) in db.query(Domain.name)
+        .filter(Domain.active == True)  # noqa: E712
+        .order_by(Domain.name)
+        .all()
+    ]
+    return list(dict.fromkeys(stored_domains + report_domains))
+
+
 @router.get("/summary", response_model=DomainSummaryResponse)
 async def get_domains_summary(db: Session = Depends(get_db)):
     """
@@ -295,7 +322,7 @@ async def get_domains_summary(db: Session = Depends(get_db)):
     """
     store = ReportStore.get_instance()
     hydrate_report_store_from_db(db, store)
-    domains = store.get_domains()
+    domains = _domain_names_for_summary(db, store)
     summaries = store.get_all_domain_summaries()
 
     # Perform DNS checks for all domains, reusing fresh cached results.
@@ -385,19 +412,28 @@ async def get_domains_summary(db: Session = Depends(get_db)):
 async def read_domains(db: Session = Depends(get_db)):
     """
     Retrieve domains with their statistics.
-    For Milestone 1, this simply returns domains from the in-memory store.
     """
     store = ReportStore.get_instance()
     hydrate_report_store_from_db(db, store)
-    domains = store.get_domains()
+    domains = _domain_names_for_summary(db, store)
     summaries = store.get_all_domain_summaries()
+    stored = {
+        domain.name: domain
+        for domain in db.query(Domain).filter(Domain.name.in_(domains)).all()
+    }
 
     result = []
     for domain_name in domains:
         summary = summaries.get(domain_name, {})
+        stored_domain = stored.get(domain_name)
         domain_response = DomainResponse(
             name=domain_name,
-            policy=summary.get("policy", "unknown"),
+            description=stored_domain.description if stored_domain else None,
+            policy=(
+                summary.get("policy")
+                or (stored_domain.dmarc_policy if stored_domain else None)
+                or "unknown"
+            ),
             reports_count=summary.get("reports_processed", 0),
             emails_count=summary.get("total_count", 0),
             compliance_rate=summary.get("compliance_rate", 0.0),
@@ -407,6 +443,58 @@ async def read_domains(db: Session = Depends(get_db)):
     return result
 
 
+@router.post("/domains", response_model=DomainResponse, status_code=status.HTTP_201_CREATED)
+async def create_domain(
+    payload: DomainCreate,
+    db: Session = Depends(get_db),
+    _auth: dict = Depends(require_admin_auth),
+):
+    """Create a monitored domain before any DMARC reports have arrived."""
+    name = _normalize_domain_name(payload.name)
+    validation = validate_domain_config(
+        {"name": name, "description": payload.description or ""}
+    )
+    if not validation["valid"]:
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+            detail=validation["errors"],
+        )
+    existing = db.query(Domain).filter(Domain.name == name).first()
+    if existing:
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail="Domain is already monitored",
+        )
+
+    selectors = ",".join(
+        selector.strip()
+        for selector in payload.dkim_selectors or []
+        if selector and selector.strip()
+    )
+    domain = Domain(
+        name=name,
+        description=payload.description,
+        dkim_selectors=selectors or None,
+        active=True,
+        verified=False,
+    )
+    db.add(domain)
+    try:
+        db.commit()
+    except IntegrityError as exc:
+        db.rollback()
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail="Domain is already monitored",
+        ) from exc
+    db.refresh(domain)
+    return DomainResponse(
+        name=domain.name,
+        description=domain.description,
+        policy=domain.dmarc_policy or "unknown",
+    )
+
+
 @router.get("/domains/{domain_name}", response_model=DomainResponse)
 async def read_domain(domain_name: str, db: Session = Depends(get_db)):
     """
@@ -415,8 +503,9 @@ async def read_domain(domain_name: str, db: Session = Depends(get_db)):
     store = ReportStore.get_instance()
     hydrate_report_store_from_db(db, store)
     domains = store.get_domains()
+    stored_domain = db.query(Domain).filter(Domain.name == domain_name).first()
 
-    if domain_name not in domains:
+    if domain_name not in domains and stored_domain is None:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
             detail="Domain not found",
@@ -426,7 +515,12 @@ async def read_domain(domain_name: str, db: Session = Depends(get_db)):
 
     return DomainResponse(
         name=domain_name,
-        policy=summary.get("policy", "unknown"),
+        description=stored_domain.description if stored_domain else None,
+        policy=(
+            summary.get("policy")
+            or (stored_domain.dmarc_policy if stored_domain else None)
+            or "unknown"
+        ),
         reports_count=summary.get("reports_processed", 0),
         emails_count=summary.get("total_count", 0),
         compliance_rate=summary.get("compliance_rate", 0.0),
diff --git a/backend/app/api/api_v1/endpoints/health.py b/backend/app/api/api_v1/endpoints/health.py
index a721120..e9c73a3 100644
--- a/backend/app/api/api_v1/endpoints/health.py
+++ b/backend/app/api/api_v1/endpoints/health.py
@@ -1,6 +1,14 @@
-from fastapi import APIRouter
+from fastapi import APIRouter, Depends
+from sqlalchemy import func, text
+from sqlalchemy.orm import Session
 
 from app.api.api_v1.endpoints.setup import setup_status
+from app.core.database import get_db
+from app.core.security import require_admin_auth
+from app.models.mail_source import MailSource
+from app.models.mail_source_import import MailSourceImport
+from app.models.report import DMARCReport
+from app.services.runtime_status import get_scheduler_status
 
 router = APIRouter()
 
@@ -17,3 +25,94 @@ async def health_check():
         "service": "dmarq",
         "is_setup_complete": setup_status["is_setup_complete"],
     }
+
+
+def _iso(value):
+    return value.isoformat() if value else None
+
+
+@router.get("/health/operations", status_code=200)
+async def operations_health(
+    db: Session = Depends(get_db),
+    _auth: dict = Depends(require_admin_auth),
+):
+    """Return operational health details for the web health page."""
+    database = {"ok": True, "detail": "Connected"}
+    try:
+        db.execute(text("SELECT 1"))
+    except Exception as exc:  # pylint: disable=broad-exception-caught
+        database = {"ok": False, "detail": str(exc)}
+
+    enabled_sources = 0
+    total_sources = 0
+    report_count = 0
+    latest_report = None
+    latest_import = None
+    latest_successful_import = None
+    if database["ok"]:
+        enabled_sources = (
+            db.query(func.count(MailSource.id))
+            .filter(MailSource.enabled == True)  # noqa: E712
+            .scalar()
+        )
+        total_sources = db.query(func.count(MailSource.id)).scalar()
+        report_count = db.query(func.count(DMARCReport.id)).scalar()
+        latest_report = db.query(func.max(DMARCReport.processed_at)).scalar()
+        latest_import = (
+            db.query(MailSourceImport)
+            .order_by(MailSourceImport.finished_at.desc(), MailSourceImport.id.desc())
+            .first()
+        )
+        latest_successful_import = (
+            db.query(MailSourceImport)
+            .filter(MailSourceImport.status.in_(["success", "warning"]))
+            .order_by(MailSourceImport.finished_at.desc(), MailSourceImport.id.desc())
+            .first()
+        )
+
+    scheduler = get_scheduler_status()
+    status = "ok"
+    checks = []
+    if not database["ok"]:
+        status = "degraded"
+        checks.append("Database connectivity failed.")
+    if total_sources and enabled_sources == 0:
+        status = "degraded"
+        checks.append("All mail sources are disabled.")
+    if scheduler.get("last_error"):
+        status = "degraded"
+        checks.append("The scheduler reported a recent error.")
+
+    return {
+        "status": status,
+        "service": "dmarq",
+        "database": database,
+        "scheduler": {
+            **scheduler,
+            "enabled_sources": int(enabled_sources or 0),
+            "total_sources": int(total_sources or 0),
+        },
+        "imports": {
+            "latest": {
+                "status": latest_import.status,
+                "trigger": latest_import.trigger,
+                "reports_found": latest_import.reports_found,
+                "finished_at": _iso(latest_import.finished_at),
+            }
+            if latest_import
+            else None,
+            "latest_successful": {
+                "status": latest_successful_import.status,
+                "trigger": latest_successful_import.trigger,
+                "reports_found": latest_successful_import.reports_found,
+                "finished_at": _iso(latest_successful_import.finished_at),
+            }
+            if latest_successful_import
+            else None,
+        },
+        "reports": {
+            "count": int(report_count or 0),
+            "latest_processed_at": _iso(latest_report),
+        },
+        "checks": checks,
+    }
diff --git a/backend/app/api/api_v1/endpoints/setup.py b/backend/app/api/api_v1/endpoints/setup.py
index 11b3bf1..502a30a 100644
--- a/backend/app/api/api_v1/endpoints/setup.py
+++ b/backend/app/api/api_v1/endpoints/setup.py
@@ -7,6 +7,8 @@ from sqlalchemy.orm import Session
 
 from app.core.database import get_db
 from app.core.security import api_key_header, require_admin_auth, security_bearer
+from app.models.domain import Domain
+from app.models.mail_source import MailSource
 from app.models.setting import Setting
 
 router = APIRouter()
@@ -89,6 +91,9 @@ class SetupStatusResponse(BaseModel):
 
     is_setup_complete: bool
     app_name: str
+    total_domains: int = 0
+    total_mail_sources: int = 0
+    enabled_mail_sources: int = 0
 
 
 class AdminSetupRequest(BaseModel):
@@ -125,6 +130,11 @@ async def get_setup_status(db: Session = Depends(get_db)):
     return SetupStatusResponse(
         is_setup_complete=current_status["is_setup_complete"],
         app_name=current_status["app_name"],
+        total_domains=db.query(Domain.id).count(),
+        total_mail_sources=db.query(MailSource.id).count(),
+        enabled_mail_sources=db.query(MailSource.id)
+        .filter(MailSource.enabled == True)  # noqa: E712
+        .count(),
     )
 
 
diff --git a/backend/app/main.py b/backend/app/main.py
index bfc004d..cec4dcd 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -2,6 +2,7 @@ import asyncio
 import logging
 import os
 from datetime import datetime
+from typing import List, Optional
 
 from fastapi import Depends, FastAPI, Query, Request
 from fastapi.middleware.cors import CORSMiddleware
@@ -24,12 +25,20 @@ from app.core.security import add_api_key, generate_api_key, require_admin_auth
 from app.core.startup_checks import run_startup_checks
 from app.middleware.auth import AuthRedirectMiddleware
 from app.middleware.security import SecurityHeadersMiddleware
+from app.models.domain import Domain
 from app.models.mail_source import MailSource  # noqa: F401 – ensure table is registered
 from app.services.gmail_client import GmailClient
 from app.services.imap_client import IMAPClient
 from app.services.import_history import record_import_attempt
 from app.services.report_persistence import hydrate_report_store_from_db
 from app.services.report_store import ReportStore
+from app.services.runtime_status import (
+    mark_scheduler_cycle_started,
+    mark_scheduler_error,
+    mark_scheduler_started,
+    mark_scheduler_stopped,
+    mark_scheduler_success,
+)
 from app.services.summary_notifications import send_due_scheduled_summaries
 
 # Set up logging
@@ -203,7 +212,7 @@ def _send_due_summary_notifications() -> None:
 
 
 def _next_sleep_seconds(
-    min_sleep: int = 60, enabled_sources: list[MailSource] | None = None
+    min_sleep: int = 60, enabled_sources: Optional[List[MailSource]] = None
 ) -> int:
     """Return how many seconds to sleep until the next polling cycle."""
     try:
@@ -226,11 +235,14 @@ async def scheduled_imap_polling():
     try:
         while True:
             logger.info("Starting scheduled IMAP polling for DMARC reports")
+            mark_scheduler_cycle_started()
             try:
                 enabled_sources = _poll_all_enabled_sources()
                 _send_due_summary_notifications()
+                mark_scheduler_success()
             except Exception as e:  # pylint: disable=broad-exception-caught
                 logger.error("Error in IMAP polling task: %s", str(e))
+                mark_scheduler_error(e)
                 enabled_sources = None
 
             try:
@@ -243,6 +255,7 @@ async def scheduled_imap_polling():
 
     except asyncio.CancelledError:
         logger.info("IMAP polling task cancelled")
+        mark_scheduler_stopped()
 
 
 def _migrate_imap_env_vars_to_db() -> None:
@@ -407,6 +420,7 @@ def create_app() -> FastAPI:
 
         # Start background polling task (iterates over DB-enabled mail sources)
         logger.info("Starting IMAP polling background task")
+        mark_scheduler_started()
         background_task = asyncio.create_task(scheduled_imap_polling())
 
     @application.on_event("shutdown")
@@ -419,6 +433,7 @@ def create_app() -> FastAPI:
                 await background_task
             except asyncio.CancelledError:
                 pass
+            mark_scheduler_stopped()
 
     return application
 
@@ -484,17 +499,18 @@ async def domain_details(request: Request, domain_id: str):
     db = SessionLocal()
     try:
         hydrate_report_store_from_db(db, store)
+        stored_domain = db.query(Domain).filter(Domain.name == domain_id).first()
     finally:
         db.close()
     known_domains = store.get_domains()
 
-    if domain_id not in known_domains:
+    if domain_id not in known_domains and stored_domain is None:
         # Domain not found, redirect to domains list
         return templates.TemplateResponse(
             request, "domains.html", {"error": f"Domain {domain_id} not found"}
         )
 
-    domain_summary = store.get_domain_summary(domain_id)
+    domain_summary = store.get_domain_summary(domain_id) if domain_id in known_domains else {}
 
     return templates.TemplateResponse(
         request,
@@ -503,8 +519,12 @@ async def domain_details(request: Request, domain_id: str):
             "domain_id": domain_id,
             "domain": {
                 "name": domain_id,
-                "description": "",  # Add description if available
-                "policy": domain_summary.get("policy", "unknown"),
+                "description": stored_domain.description if stored_domain else "",
+                "policy": (
+                    domain_summary.get("policy")
+                    or (stored_domain.dmarc_policy if stored_domain else None)
+                    or "unknown"
+                ),
             },
         },
     )
@@ -550,6 +570,11 @@ async def mail_sources_page(request: Request):
     return templates.TemplateResponse(request, "mail_sources.html")
 
 
+@app.get("/operations", response_class=HTMLResponse)
+async def operations_page(request: Request):
+    return templates.TemplateResponse(request, "operations.html")
+
+
 @app.get("/upload", response_class=HTMLResponse)
 async def upload_page(request: Request):
     return templates.TemplateResponse(request, "upload.html")
diff --git a/backend/app/models/dns_cache.py b/backend/app/models/dns_cache.py
index fcb992b..c230d6e 100644
--- a/backend/app/models/dns_cache.py
+++ b/backend/app/models/dns_cache.py
@@ -1,4 +1,4 @@
-from datetime import UTC, datetime
+from datetime import datetime, timezone
 
 from sqlalchemy import Boolean, Column, DateTime, Index, Integer, String, Text, UniqueConstraint
 
@@ -6,7 +6,7 @@ from app.core.database import Base
 
 
 def _utcnow_naive() -> datetime:
-    return datetime.now(UTC).replace(tzinfo=None)
+    return datetime.now(timezone.utc).replace(tzinfo=None)
 
 
 class DNSCache(Base):
diff --git a/backend/app/services/cloudflare_dns.py b/backend/app/services/cloudflare_dns.py
index 75833fa..b7e0465 100644
--- a/backend/app/services/cloudflare_dns.py
+++ b/backend/app/services/cloudflare_dns.py
@@ -5,7 +5,7 @@ from __future__ import annotations
 import hashlib
 import json
 from dataclasses import dataclass
-from datetime import UTC, datetime
+from datetime import datetime, timezone
 from typing import Any, Dict, List, Optional
 
 from sqlalchemy.orm import Session
@@ -33,7 +33,7 @@ class CloudflareCredentials:
 
 
 def _utcnow_naive() -> datetime:
-    return datetime.now(UTC).replace(tzinfo=None)
+    return datetime.now(timezone.utc).replace(tzinfo=None)
 
 
 def _plain_setting_value(db: Session, key: str) -> Optional[str]:
diff --git a/backend/app/services/dns_cache.py b/backend/app/services/dns_cache.py
index 70b0943..042f045 100644
--- a/backend/app/services/dns_cache.py
+++ b/backend/app/services/dns_cache.py
@@ -5,7 +5,7 @@ from __future__ import annotations
 import hashlib
 import json
 from dataclasses import asdict
-from datetime import UTC, datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from typing import List, Tuple
 
 from sqlalchemy.orm import Session
@@ -17,7 +17,7 @@ DEFAULT_DNS_CACHE_TTL_SECONDS = 900
 
 
 def _utcnow_naive() -> datetime:
-    return datetime.now(UTC).replace(tzinfo=None)
+    return datetime.now(timezone.utc).replace(tzinfo=None)
 
 
 def _selectors_key(selectors: List[str]) -> str:
diff --git a/backend/app/services/imap_client.py b/backend/app/services/imap_client.py
index 99e31da..d83ce35 100644
--- a/backend/app/services/imap_client.py
+++ b/backend/app/services/imap_client.py
@@ -392,7 +392,7 @@ class IMAPClient:
         )
 
     @staticmethod
-    def _append_detail(stats: dict | None, **detail: str) -> None:
+    def _append_detail(stats: Optional[Dict[str, Any]], **detail: str) -> None:
         """Append a compact attachment/message outcome to the import stats."""
         if stats is None:
             return
@@ -405,8 +405,8 @@ class IMAPClient:
         report: Dict[str, Any],
         *,
         filename: str,
-        stats: dict | None,
-        message_id: str | None,
+        stats: Optional[Dict[str, Any]],
+        message_id: Optional[str],
     ) -> bool:
         domain = report.get("domain", "unknown")
         report_id = report.get("report_id", "")
@@ -445,8 +445,8 @@ class IMAPClient:
         part: email.message.Message,
         *,
         filename: str,
-        stats: dict | None,
-        message_id: str | None,
+        stats: Optional[Dict[str, Any]],
+        message_id: Optional[str],
     ) -> bool:
         try:
             content = part.get_payload(decode=True)
@@ -487,8 +487,8 @@ class IMAPClient:
     def _process_attachments(
         self,
         msg: email.message.Message,
-        stats: dict | None = None,
-        message_id: str | None = None,
+        stats: Optional[Dict[str, Any]] = None,
+        message_id: Optional[str] = None,
     ) -> int:
         """
         Process email attachments that might be DMARC reports
diff --git a/backend/app/services/report_persistence.py b/backend/app/services/report_persistence.py
index 2b5769a..d386c83 100644
--- a/backend/app/services/report_persistence.py
+++ b/backend/app/services/report_persistence.py
@@ -191,7 +191,7 @@ def persisted_report_to_dict(report: DMARCReport) -> Dict[str, Any]:
     }
 
 
-def hydrate_report_store_from_db(db: Session, store: ReportStore | None = None) -> int:
+def hydrate_report_store_from_db(db: Session, store: Optional[ReportStore] = None) -> int:
     """Load persisted reports into ReportStore when the database has report rows."""
     report_count = db.query(DMARCReport.id).count()
     if report_count == 0:
diff --git a/backend/app/services/runtime_status.py b/backend/app/services/runtime_status.py
new file mode 100644
index 0000000..17a4956
--- /dev/null
+++ b/backend/app/services/runtime_status.py
@@ -0,0 +1,65 @@
+"""Small in-process status tracker for scheduler health."""
+
+from datetime import datetime
+from typing import Any, Dict, Optional
+
+
+_scheduler_state: Dict[str, Any] = {
+    "running": False,
+    "started_at": None,
+    "stopped_at": None,
+    "last_cycle_started_at": None,
+    "last_success_at": None,
+    "last_error_at": None,
+    "last_error": None,
+}
+
+
+def _iso(value: Optional[datetime]) -> Optional[str]:
+    return value.isoformat() if value else None
+
+
+def mark_scheduler_started() -> None:
+    now = datetime.utcnow()
+    _scheduler_state.update(
+        {
+            "running": True,
+            "started_at": now,
+            "stopped_at": None,
+            "last_error": None,
+        }
+    )
+
+
+def mark_scheduler_stopped() -> None:
+    _scheduler_state.update({"running": False, "stopped_at": datetime.utcnow()})
+
+
+def mark_scheduler_cycle_started() -> None:
+    _scheduler_state["last_cycle_started_at"] = datetime.utcnow()
+
+
+def mark_scheduler_success() -> None:
+    _scheduler_state.update({"last_success_at": datetime.utcnow(), "last_error": None})
+
+
+def mark_scheduler_error(error: object) -> None:
+    text = str(error)
+    _scheduler_state.update(
+        {
+            "last_error_at": datetime.utcnow(),
+            "last_error": text[:300],
+        }
+    )
+
+
+def get_scheduler_status() -> Dict[str, Any]:
+    return {
+        "running": bool(_scheduler_state["running"]),
+        "started_at": _iso(_scheduler_state["started_at"]),
+        "stopped_at": _iso(_scheduler_state["stopped_at"]),
+        "last_cycle_started_at": _iso(_scheduler_state["last_cycle_started_at"]),
+        "last_success_at": _iso(_scheduler_state["last_success_at"]),
+        "last_error_at": _iso(_scheduler_state["last_error_at"]),
+        "last_error": _scheduler_state["last_error"],
+    }
diff --git a/backend/app/templates/domains.html b/backend/app/templates/domains.html
index 1152f0f..4f19726 100644
--- a/backend/app/templates/domains.html
+++ b/backend/app/templates/domains.html
@@ -21,9 +21,9 @@
             {% call card_header() %}
                 <div class="flex items-center justify-between">
                     {% call card_title() %}Monitored Domains{% endcall %}
-                    {% call button(variant="outline", size="sm") %}
+                    <button type="button" class="btn btn-outline btn-sm" @click="openCreate = true">
                         <span class="mr-1">+</span> Add Domain
-                    {% endcall %}
+                    </button>
                 </div>
                 {% call card_description() %}
                     Domains currently being monitored for DMARC compliance
@@ -91,6 +91,40 @@
             {% endcall %}
         {% endcall %}
     </div>
+
+    <dialog class="modal" :open="openCreate">
+        <div class="modal-box max-w-2xl">
+            <h2 class="text-xl font-semibold">Add monitored domain</h2>
+            <p class="mt-1 text-sm text-base-content/70">Track DNS health and future DMARC reports before the first report arrives.</p>
+            <form class="mt-5 space-y-4" @submit.prevent="createDomain">
+                <label class="form-control">
+                    <span class="label-text font-medium">Domain</span>
+                    <input x-model.trim="newDomain.name" type="text" required placeholder="example.com" class="input input-bordered">
+                </label>
+                <label class="form-control">
+                    <span class="label-text font-medium">Description</span>
+                    <textarea x-model.trim="newDomain.description" rows="3" class="textarea textarea-bordered" placeholder="Production mail domain"></textarea>
+                </label>
+                <label class="form-control">
+                    <span class="label-text font-medium">DKIM selectors</span>
+                    <input x-model.trim="newDomain.dkim_selectors" type="text" placeholder="default, google, selector1" class="input input-bordered">
+                </label>
+                <div x-show="createError" role="alert" class="alert alert-error py-3">
+                    <span x-text="createError"></span>
+                </div>
+                <div class="modal-action">
+                    <button type="button" class="btn btn-ghost" @click="closeCreate" :disabled="saving">Cancel</button>
+                    <button type="submit" class="btn btn-primary" :disabled="saving">
+                        <span x-show="saving" class="loading loading-spinner loading-xs"></span>
+                        Add domain
+                    </button>
+                </div>
+            </form>
+        </div>
+        <form method="dialog" class="modal-backdrop">
+            <button type="button" @click="closeCreate">close</button>
+        </form>
+    </dialog>
 </div>
 {% endblock %}
 
@@ -99,6 +133,14 @@
 function domainsApp() {
     return {
         domains: [],
+        openCreate: false,
+        saving: false,
+        createError: '',
+        newDomain: {
+            name: '',
+            description: '',
+            dkim_selectors: '',
+        },
 
         init() {
             // Fetch domains from server
@@ -128,8 +170,47 @@ function domainsApp() {
             } catch (error) {
                 console.error('Error fetching domains:', error);
             }
-        }
+        },
+
+        closeCreate() {
+            this.openCreate = false;
+            this.createError = '';
+            this.newDomain = { name: '', description: '', dkim_selectors: '' };
+        },
+
+        async createDomain() {
+            this.saving = true;
+            this.createError = '';
+            try {
+                const selectors = this.newDomain.dkim_selectors
+                    .split(',')
+                    .map((selector) => selector.trim())
+                    .filter(Boolean);
+                const response = await fetch('/api/v1/domains/domains', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({
+                        name: this.newDomain.name,
+                        description: this.newDomain.description || null,
+                        dkim_selectors: selectors,
+                    }),
+                });
+                if (!response.ok) {
+                    const data = await response.json().catch(() => ({}));
+                    const detail = typeof data.detail === 'string'
+                        ? data.detail
+                        : Object.values(data.detail || {}).join(', ');
+                    throw new Error(detail || 'Domain could not be added.');
+                }
+                this.closeCreate();
+                await this.fetchDomains();
+            } catch (error) {
+                this.createError = error.message || 'Domain could not be added.';
+            } finally {
+                this.saving = false;
+            }
+        },
     }
 }
 </script>
-{% endblock %}
\ No newline at end of file
+{% endblock %}
diff --git a/backend/app/templates/layouts/base.html b/backend/app/templates/layouts/base.html
index 4928bab..e699513 100644
--- a/backend/app/templates/layouts/base.html
+++ b/backend/app/templates/layouts/base.html
@@ -40,6 +40,7 @@
                 <li><a href="/reports">Reports</a></li>
                 <li><a href="/upload">Upload</a></li>
                 <li><a href="/mail-sources">Mail Sources</a></li>
+                <li><a href="/operations">Health</a></li>
                 <li><a href="/settings">Settings</a></li>
             </ul>
             <!-- User menu -->
@@ -122,4 +123,4 @@
         });
     </script>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/backend/app/templates/operations.html b/backend/app/templates/operations.html
new file mode 100644
index 0000000..23fd639
--- /dev/null
+++ b/backend/app/templates/operations.html
@@ -0,0 +1,148 @@
+{% extends "layouts/base.html" %}
+
+{% block title %}DMARQ - Health{% endblock %}
+
+{% block content %}
+<div class="mx-auto max-w-6xl space-y-6" x-data="operationsHealth()" x-init="load()">
+    <div class="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
+        <div>
+            <h1 class="text-2xl font-bold">System Health</h1>
+            <p class="mt-1 text-sm text-base-content/70">Operational status for imports, scheduler activity, and storage.</p>
+        </div>
+        <button class="btn btn-outline btn-sm" @click="load" :disabled="loading">
+            <span x-show="loading" class="loading loading-spinner loading-xs"></span>
+            Refresh
+        </button>
+    </div>
+
+    <div x-show="error" role="alert" class="alert alert-error">
+        <span x-text="error"></span>
+    </div>
+
+    <div class="grid gap-4 md:grid-cols-4">
+        <div class="card bg-base-100 shadow">
+            <div class="card-body">
+                <div class="text-sm text-base-content/60">Overall</div>
+                <div class="text-2xl font-semibold capitalize" :class="health.status === 'ok' ? 'text-success' : 'text-warning'" x-text="health.status || 'loading'"></div>
+            </div>
+        </div>
+        <div class="card bg-base-100 shadow">
+            <div class="card-body">
+                <div class="text-sm text-base-content/60">Database</div>
+                <div class="text-2xl font-semibold" :class="health.database?.ok ? 'text-success' : 'text-error'" x-text="health.database?.ok ? 'Connected' : 'Failed'"></div>
+            </div>
+        </div>
+        <div class="card bg-base-100 shadow">
+            <div class="card-body">
+                <div class="text-sm text-base-content/60">Mail Sources</div>
+                <div class="text-2xl font-semibold" x-text="`${health.scheduler?.enabled_sources || 0}/${health.scheduler?.total_sources || 0}`"></div>
+            </div>
+        </div>
+        <div class="card bg-base-100 shadow">
+            <div class="card-body">
+                <div class="text-sm text-base-content/60">Reports</div>
+                <div class="text-2xl font-semibold" x-text="health.reports?.count || 0"></div>
+            </div>
+        </div>
+    </div>
+
+    <div class="grid gap-6 lg:grid-cols-2">
+        <section class="card bg-base-100 shadow">
+            <div class="card-body">
+                <h2 class="card-title">Scheduler</h2>
+                <dl class="grid gap-3 text-sm sm:grid-cols-2">
+                    <div>
+                        <dt class="text-base-content/60">State</dt>
+                        <dd class="font-medium" x-text="health.scheduler?.running ? 'Running' : 'Stopped'"></dd>
+                    </div>
+                    <div>
+                        <dt class="text-base-content/60">Last cycle</dt>
+                        <dd class="font-medium" x-text="formatDate(health.scheduler?.last_cycle_started_at)"></dd>
+                    </div>
+                    <div>
+                        <dt class="text-base-content/60">Last successful cycle</dt>
+                        <dd class="font-medium" x-text="formatDate(health.scheduler?.last_success_at)"></dd>
+                    </div>
+                    <div>
+                        <dt class="text-base-content/60">Last error</dt>
+                        <dd class="font-medium" x-text="health.scheduler?.last_error || 'None'"></dd>
+                    </div>
+                </dl>
+            </div>
+        </section>
+
+        <section class="card bg-base-100 shadow">
+            <div class="card-body">
+                <h2 class="card-title">Imports</h2>
+                <dl class="grid gap-3 text-sm sm:grid-cols-2">
+                    <div>
+                        <dt class="text-base-content/60">Last completed</dt>
+                        <dd class="font-medium" x-text="formatImport(health.imports?.latest)"></dd>
+                    </div>
+                    <div>
+                        <dt class="text-base-content/60">Last successful</dt>
+                        <dd class="font-medium" x-text="formatImport(health.imports?.latest_successful)"></dd>
+                    </div>
+                    <div>
+                        <dt class="text-base-content/60">Latest report</dt>
+                        <dd class="font-medium" x-text="formatDate(health.reports?.latest_processed_at)"></dd>
+                    </div>
+                    <div>
+                        <dt class="text-base-content/60">Database detail</dt>
+                        <dd class="font-medium" x-text="health.database?.detail || 'Unknown'"></dd>
+                    </div>
+                </dl>
+            </div>
+        </section>
+    </div>
+
+    <section class="card bg-base-100 shadow" x-show="health.checks?.length">
+        <div class="card-body">
+            <h2 class="card-title">Attention</h2>
+            <ul class="list-disc space-y-2 pl-5 text-sm">
+                <template x-for="check in health.checks" :key="check">
+                    <li x-text="check"></li>
+                </template>
+            </ul>
+        </div>
+    </section>
+</div>
+{% endblock %}
+
+{% block scripts %}
+<script>
+function operationsHealth() {
+    return {
+        loading: false,
+        error: '',
+        health: {},
+
+        async load() {
+            this.loading = true;
+            this.error = '';
+            try {
+                const response = await fetch('/api/v1/health/operations');
+                if (!response.ok) {
+                    throw new Error('Health details could not be loaded.');
+                }
+                this.health = await response.json();
+            } catch (error) {
+                this.error = error.message || 'Health details could not be loaded.';
+            } finally {
+                this.loading = false;
+            }
+        },
+
+        formatDate(value) {
+            if (!value) return 'Not recorded';
+            return new Date(value).toLocaleString();
+        },
+
+        formatImport(value) {
+            if (!value) return 'Not recorded';
+            return `${value.status} (${value.reports_found} reports) at ${this.formatDate(value.finished_at)}`;
+        },
+    };
+}
+</script>
+{% endblock %}
diff --git a/backend/app/templates/setup.html b/backend/app/templates/setup.html
index dac8b12..554f590 100644
--- a/backend/app/templates/setup.html
+++ b/backend/app/templates/setup.html
@@ -166,19 +166,27 @@
 
             <div class="card bg-base-100 shadow">
                 <div class="card-body">
-                    <h2 class="card-title text-lg">Next steps</h2>
+                    <h2 class="card-title text-lg">Setup checklist</h2>
                     <ul class="space-y-3 text-sm text-base-content/70">
                         <li class="flex gap-2">
                             <span class="mt-1 h-2 w-2 rounded-full bg-primary"></span>
-                            <span>Add a mail source from the Mail Sources page.</span>
+                            <span>
+                                <a href="/domains" class="link link-primary font-medium">Add monitored domains</a>
+                                <span class="ml-1" x-text="`(${totalDomains} configured)`"></span>
+                            </span>
                         </li>
                         <li class="flex gap-2">
                             <span class="mt-1 h-2 w-2 rounded-full bg-secondary"></span>
-                            <span>Import DMARC reports from Gmail, IMAP, upload, or webhook.</span>
+                            <span>
+                                <a href="/mail-sources" class="link link-primary font-medium">Connect a mailbox</a>
+                                <span class="ml-1" x-text="`(${enabledMailSources}/${totalMailSources} enabled)`"></span>
+                            </span>
                         </li>
                         <li class="flex gap-2">
                             <span class="mt-1 h-2 w-2 rounded-full bg-accent"></span>
-                            <span>Use DNS health checks to review SPF, DKIM, and DMARC records.</span>
+                            <span>
+                                <a href="/operations" class="link link-primary font-medium">Check system health</a>
+                            </span>
                         </li>
                     </ul>
                 </div>
@@ -196,6 +204,9 @@
             complete: false,
             error: '',
             message: '',
+            totalDomains: 0,
+            totalMailSources: 0,
+            enabledMailSources: 0,
             steps: [
                 { id: 1, title: 'Admin', detail: 'Contact details' },
                 { id: 2, title: 'System', detail: 'Name and URL' },
@@ -222,6 +233,9 @@
                     this.system.app_name = status.app_name || this.system.app_name;
                     this.complete = Boolean(status.is_setup_complete);
                     this.currentStep = this.complete ? 3 : 1;
+                    this.totalDomains = status.total_domains || 0;
+                    this.totalMailSources = status.total_mail_sources || 0;
+                    this.enabledMailSources = status.enabled_mail_sources || 0;
                 } catch (err) {
                     this.error = err.message || 'Could not load setup status.';
                 } finally {
diff --git a/backend/app/tests/test_api.py b/backend/app/tests/test_api.py
index 0b6cef1..b57b147 100644
--- a/backend/app/tests/test_api.py
+++ b/backend/app/tests/test_api.py
@@ -18,6 +18,42 @@ def test_domains_empty(client: TestClient):
     assert data == []
 
 
+def test_create_domain_without_reports(authed_client: TestClient):
+    """A monitored domain can be created before its first report arrives."""
+    response = authed_client.post(
+        "/api/v1/domains/domains",
+        json={"name": "Example.COM.", "description": "Primary mail domain"},
+    )
+    assert response.status_code == 201
+    assert response.json()["name"] == "example.com"
+
+    list_response = authed_client.get("/api/v1/domains/domains")
+    assert list_response.status_code == 200
+    assert list_response.json()[0]["name"] == "example.com"
+    assert list_response.json()[0]["reports_count"] == 0
+
+
+def test_create_domain_rejects_duplicates(authed_client: TestClient):
+    """Creating the same monitored domain twice returns a conflict."""
+    first = authed_client.post("/api/v1/domains/domains", json={"name": "example.com"})
+    second = authed_client.post("/api/v1/domains/domains", json={"name": "EXAMPLE.com"})
+
+    assert first.status_code == 201
+    assert second.status_code == 409
+
+
+def test_operations_health_endpoint(authed_client: TestClient):
+    """Detailed health includes database, scheduler, import, and report sections."""
+    response = authed_client.get("/api/v1/health/operations")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["service"] == "dmarq"
+    assert data["database"]["ok"] is True
+    assert "scheduler" in data
+    assert "imports" in data
+    assert "reports" in data
+
+
 def test_reports_upload_invalid_extension(client: TestClient):
     """Test that uploading a file with an unsupported extension returns 400."""
     response = client.post(
diff --git a/backend/app/tests/test_webhook.py b/backend/app/tests/test_webhook.py
index ec46f81..ebecf4a 100644
--- a/backend/app/tests/test_webhook.py
+++ b/backend/app/tests/test_webhook.py
@@ -3,6 +3,7 @@ from email.header import Header
 from email.mime.application import MIMEApplication
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
+from typing import Optional
 from unittest.mock import patch
 
 import pytest
@@ -60,7 +61,7 @@ def _raw_email_with_report() -> bytes:
 
 
 def _raw_email_with_attachment(
-    filename: str | None,
+    filename: Optional[str],
     content: bytes,
     subtype: str = "octet-stream",
     subject: str = "DMARC report",
diff --git a/docs/milestones.md b/docs/milestones.md
index 0bbbfe3..1f2e5d5 100644
--- a/docs/milestones.md
+++ b/docs/milestones.md
@@ -144,15 +144,20 @@ Exit criteria:
 
 ## Milestone 9: Setup and Operations Polish
 
-Status: Planned
+Status: In Progress
 
 Goal: make first-run setup, maintenance, and troubleshooting straightforward.
 
-Planned:
-- Guided setup flow for domains and mail sources.
+Delivered:
+- First-run setup status is persisted in the database instead of only memory.
+- Setup now surfaces a checklist for monitored domains, enabled mail sources, and system health.
+- Monitored domains can be created before any DMARC report has arrived.
+- Domain summaries and detail pages include manually configured domains with no report history yet.
+- Health page and API show database connectivity, scheduler state, report totals, latest import, and latest successful import.
+
+Remaining:
 - Better mailbox test output and recovery suggestions.
-- Health page for scheduler status, last successful import, and database connectivity.
-- Operator documentation for Docker Compose and manual deployments.
+- Operator documentation refresh for Docker Compose and manual deployments.
 
 Exit criteria:
 - A new user can deploy DMARQ, connect a mailbox, and confirm the system is healthy without reading code.