This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Enabling DLP

Currently my Home UTM (9.204-20) has E_Mail protection enabled for all e-mail destined inbound to my mail server. At this time there is a firewall rule that allows the mail server to send out to the Internet and is using the correct public IP for outgoing mail when leaving the UTM.

When I go to enable DLP and set the UTM to intercept email or set the UTM as a smarthost for my mail server I am unable to send email outbound. I get the error message "Mail loops back to me".

The mail server system is postfix based inning on a UNIX os.

I have a feeling this is something simple but am not seeing it. Any ideas?

-Ron

This thread was automatically locked due to age.

0 vilic over 10 years ago

Did you by accident put your UNIX mail server in Advanced -> Smarthost settings as a Smart host ?
Cancel
Vote Up 0 Vote Down

Cancel
0 rrosson over 10 years ago in reply to vilic

Did you by accident put your UNIX mail server in Advanced -> Smarthost settings as a Smart host ?

Nope, Only thing set on the tab is "Advance Settings" with SMTP Hostname and postmaster e-mail address.
Cancel
Vote Up 0 Vote Down

Cancel
0 vilic over 10 years ago

What do you see in your UTM SMTP proxy log files when you set Smarthost settings on your UNIX system and send a test mail ?
Cancel
Vote Up 0 Vote Down

Cancel
0 BAlfson over 10 years ago

Did you configure per Exchange with SMTP Proxy?

Cheers - Bob

Sophos UTM Community Moderator
Sophos Certified Architect - UTM
Sophos Certified Engineer - XG
Gold Solution Partner since 2005

MediaSoft, Inc. USA
Cancel
Vote Up 0 Vote Down

Cancel
0 rrosson over 10 years ago

Found the issue.

Setting "SMTP Hostname" to what the internal server's name actually is, makes postfix think it is talking to itself. Once I changed that and created an internal DNS entry for it everything started working.
Cancel
Vote Up 0 Vote Down

Cancel