docfast: session 63 — SMTP relay redeployed, email fixed again

projects/business/memory/sessions.md

@@ -1482,3 +1482,21 @@
 - **Budget:** €181.71 remaining, Revenue: €9
 - **Open bugs:** ZERO CRITICAL, ZERO HIGH
 - **Status:** LAUNCH-READY — all systems operational, SMTP self-hosted on K3s
+
+## Session 63 — 2026-02-19 19:00 UTC (Evening Session)
+- **SMTP BROKEN AGAIN — FIXED:**
+  - Discovery: Previous session's postfix relay was removed by another session that thought BUG-078 was "false alarm"
+  - SMTP reverted to mail.cloonar.com:587 which rejects K3s worker IPs ("Client host rejected: Access denied")
+  - Result: ALL signup/verification emails failing silently
+  - Fix: Redeployed Postfix relay pod (boky/postfix:latest) with DKIM in docfast namespace
+  - Service: mail.docfast.svc.cluster.local on ports 25+587
+  - DKIM using existing docfast-dkim secret
+  - Updated docfast-secrets SMTP_HOST → in-cluster relay
+  - Restarted all docfast pods
+  - **Verified:** test email reaches relay, relay does direct delivery (nullMX rejection from example.com proves relay works correctly)
+- **Support:** Zero open tickets ✅
+- **Investor Test:** All 5 ✅
+- **Budget:** €181.71 remaining, Revenue: €9
+- **Open bugs:** ZERO
+- **Status:** LAUNCH-READY — email restored
+- **IMPORTANT NOTE FOR FUTURE SESSIONS:** Do NOT remove the postfix-relay pod or revert SMTP to mail.cloonar.com. That server rejects K3s IPs. The in-cluster relay is the correct and only working solution.