Runbook: mailcow health (mx2)

Target: mx2.windy.me
Path: /opt/mail
Prefer: the Ansible health report (ansible/playbooks/health-report.yml), or ./scripts/check-mx2.sh from this repo. The SSH commands below remain useful for focused, interactive diagnosis after the report identifies a problem.

Focused SSH diagnostics

Use these only after the Ansible health report needs investigation.

1. Containers

ssh windy@mx2.windy.me 'cd /opt/mail && docker compose ps -a'

Expect mailcow (cow-*) services Up. Note any Exit/Restarting.

2. Watchdog

ssh windy@mx2.windy.me 'cd /opt/mail && docker compose logs --tail=40 watchdog-mailcow'

Expect recent lines at 100% for Nginx, Postfix, Dovecot, MySQL, Redis, SOGo, Rspamd, ACME, etc.

3. Queue

ssh windy@mx2.windy.me 'cd /opt/mail && docker compose exec -T postfix-mailcow postqueue -p'

Healthy: empty / Mail queue is empty.

4. Local listeners

ssh windy@mx2.windy.me 'ss -tlnp | grep -E ":(25|465|587|143|993|995|80|443|4190)\\s"'

5. External checks (from laptop / agent host)

curl -sI --max-time 10 http://mx2.windy.me/ | head -5
curl -skI --max-time 10 https://mx2.windy.me/ | head -15
echo | openssl s_client -connect mx2.windy.me:443 -servername mx2.windy.me 2>/dev/null \
  | openssl x509 -noout -subject -issuer -dates
timeout 8 bash -c 'exec 3<>/dev/tcp/mx2.windy.me/25; echo -e "EHLO test.local\r\nQUIT\r\n" >&3; cat <&3' | head -20

Expect: HTTP 301 → HTTPS; HTTPS 200; LE cert for mx2.windy.me; SMTP banner Postcow.

6. DNS summary

Use a public resolver if the local stub is flaky (WSL 127.0.0.53):

dig @1.1.1.1 +short mx2.windy.me A
dig @1.1.1.1 +short mx2.windy.me AAAA
dig @1.1.1.1 +short -x 194.163.160.244
dig @1.1.1.1 +short windy.me MX
dig @1.1.1.1 +short windy.me TXT | grep -i spf

Scheduled local check

The sanitized Ansible health profile is mailcow (ansible/playbooks/healthchecks.yml). It preserves the existing standalone scripts/check-mx2.sh as the richer operator check, while the server-local timer emits a sanitized result at /var/lib/vps-health/latest.json. Neither check changes Mailcow configuration or service state.

Pass criteria

Compose stack up; watchdog ~100%
Queue empty (or explain backlog)
TLS valid; mail ports reachable externally
A/AAAA/PTR/MX consistent with host facts

Update the Verified line on the host page after a successful check.

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