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argocd-apps/apps/base/mail/smarthost/relay_domains
T
unkin-agent 70dd1bd775 Add postfix smarthost to the mail namespace (#541)
Mail needs one routing hub between the edge gateways, Stalwart and the lab: inbound to Stalwart over LMTP, outbound to the gateways, all of it through rspamd.

- add a 2-replica postfix StatefulSet `mail-in.main.unkin.net` (50Gi spool per pod, node spread, PDB)
- serve port 25 with the LE `*.main.unkin.net` wildcard, reflected into `mail`
- gateways (TLS, XFORWARD) relay to relay_domains with LMTP recipient verification; lab and pods relay anywhere
- pass all mail through the rspamd milter, tempfailing when it is down
- limit port 25 via NetworkPolicy to gateways, lab and `mail.unkin.net/smarthost-client=true` pods
- relay outbound via mta1/mta2.edge.unkin.net with verified TLS; add ClusterIP + LB 198.18.200.16

Requires #539 merged.

Reviewed-on: #541
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>
2026-10-12 22:30:47 +11:00

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