The exposed ports should be cut down: just
:25
for:latest
:tls-out
, and just:587
:25
and:465
for:dovecot
:latest
and:tls-in
.Edit 6/21/2023: Good idea, but the image tags have been reworked significantly and I am preferring SMTPS over Submission and I discovered that keeping
:25
open is pretty important.
Obviously depends on #2
Adopt some details from here
No longer doing the Dovecot route, so no longer depends on #2. Cyrus is pretty simple for small installations.
postfix:latest
andpostfix:tls-in
have been deployed for a week now, no issues. Will be deployingpostfix:tls-out
shortly. Closing for now.