The SMTP Proxy always sends from "External (Address)"- it's the reason that I recommend naming the UTM something like mail.domain.com, and having the mail IP be the primary IP on the External interface.
Cheers - Bob
Sophos UTM Community Moderator Sophos Certified Architect - UTM Sophos Certified Engineer - XG Gold Solution Partner since 2005
The SMTP Proxy always sends from "External (Address)"- it's the reason that I recommend naming the UTM something like mail.domain.com, and having the mail IP be the primary IP on the External interface.
Cheers - Bob
Sophos UTM Community Moderator Sophos Certified Architect - UTM Sophos Certified Engineer - XG Gold Solution Partner since 2005