mail_relay: postfix relays all mail through the mailcow submission port with a mailbox per host, replaces mail_aliases

2026-10-26 09:44:37 +00:00
parent c91c56b153
commit 885e6f3338
7 changed files with 235 additions and 29 deletions
@@ -0,0 +1,18 @@
+---
+# Every host sends its mail through the mailcow submission port with its own mailbox
+# (doc/host-mail-relay.md in the kubernetes repo). The password is set in host_vars.
+mail_relay:
+  host: tranio.ruekov.eu
+  port: 587
+  # SASL login of the mailcow mailbox; the password is an SMTP-only app password of it.
+  username: "{{ inventory_hostname_short }}.system@mail.ruekov.eu"
+  # Sender address every local address is rewritten to; mailcow accepts only addresses of the login.
+  sender: "{{ mail_relay.username }}"
+  password: ""
+  # Root mail goes to this address: /etc/aliases and, on Proxmox hosts, the email of root@pam.
+  root_mail: admin@ruekov.eu
+  myhostname: "{{ inventory_hostname }}"
+  # The local postfix only takes mail from the host itself.
+  inet_interfaces: loopback-only
+  # The smtp inet service of master.cf; off where another daemon holds port 25 (tranio: mailcow).
+  smtpd_listener: true