[pfx] Preventing unauthorised senders

2024-07-10 Thread Serhii via Postfix-users
On 7/10/24 08:40, Gilgongo via Postfix-users wrote: As you can see, it goes straight to the MX of the domain of the recipient. The same is true if I use mail.mailutils or other clients. So I was wondering how I might both allow sending but also (reliably) prevent abuse. Perhaps doing both isn'

[pfx] Preventing unauthorised senders

2024-07-09 Thread Gilgongo via Postfix-users
I've set up our mail server (with some help from this list, for which much thanks) to scan sasl-auth senders for spam and viruses with Amavis. I'd now like to make sure that rogue processes can't bypass those checks, particularly web servers (I already have PHP using msmtp to enforce well-behaved