Hello list, is there a way to enforce TLS dependent on the sender domain?
Background: Many customers are using our SMTP infrastructure (opportunistic TLS is active). Now one customer wants to enforce TLS to a certain destination; can I do this without affecting all other customers (who might as well send mails to this destination, but did not ask for enforced TLS)? The only ways I can think of involve more SMTP servers (or at least instances). Is there an easy solution to this? Thanks in advance!
