If possible, could you please explain how to limit port 25 to receive only?
I use port 587 (submission) for sending mail. thank you. On Wed, 21 Dec 2022 11:47:16 -0500 Demi Marie Obenour <demioben...@gmail.com> wrote: > An alternative, which I prefer, is to require all submission to be on port > 465 (over TLS) and require SASL authentication on that port. Port 25 would > then be for receiving email only. I prefer using client certificates for > authentication, and having the secret keys injected when launching the > containers (they would not be in the images).
