How to "drop" mails instead of "reject" in MTA mode

Hi all! This is a follow-up of a question I posted 7 month ago - and dind't wrote back (sorry!). How to "drop" mails instead of "reject" This is still not resolved, so I ask again: ***********...
MTA is a desaster since v20!!!

Hi All we are running a RED 15w with v20.0 GA No email is transmitted to any target as a "system" related email was generated to the queue like backup" Our email server is behind the RED tunnel !!! So...
Sophos Firewall and Office365 via MTA - was Hybrid, now Online only

Hello all, we are using our Sophos XGS-Firewall as a SMTP proxy with MTA. We have an Exchange Hybrid environment. The mail flow right now is as following: OUTBOUND: Exchange Online -> The internet...
Sophos MTA/VPN/VPN-Portal/User-Portal etc. mit Authentifizierung am ADDS

Schönen guten Tag zusammen, folgendes ist mir grade aufgefallen. Wenn das ADDS nicht erreichbar ist, lässt der Sophos-MTA, Mails zum E-Mail-Server durch, an Empfänger die es gar nicht gibt! Dann antwortet...
Discover mode not working

Hi. I'm running Sophos XG Home virtual machine in unraid and trying to use it in discover mode. I followed the configuration guide in Deploy the firewall in discover mode - Sophos Firewall and configured...