Fairly inconvenient problem with the UTM and Exchange, when running Email Protection.
Sophos responding to the whole distribution group not the original sender or the "owner" of the distribution group.
When sending mail as a distribution group from an Exchange server to a recipient that does not exist, by default the NDR is received only by the original sender or the owner of the group, when using Sophos UTM SMTP relay, the NDR comes from the UTM instead and it responds to the whole distribution group. Is this intended, and not adjustable? Anyone has encountered this before?
UTM 9.4, Exchange 2013.
NDR From UTM :
To: XX-Members <XX-Members@domain.com>
Subject: smtp.domain.com Mail delivery failed : returning message to sender
This message was created automatically by the SMTP relay on smtp.domain.com.
A message that you sent could not be delivered to all of its recipients.
The following address(es) failed:
remote.user@contoso.com
retry timeout exceeded
This thread was automatically locked due to age.
