how to bypass email scanner?

F-R-C
F-R-C used Ask the Experts™
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Hi

For email on our domain we use Exchange 2003 and also we have a Sophos email appliance that sits on our LAN and scans our outgoing messages. The email scanner is now broken and so when a user tries to send an external email, which would normally go through the Sophos box,  its not going anywhere - how can I resolve this so that the email bypasses the mail scanners IP address?

thanks
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Will SzymkowskiSenior Solution Architect
Most Valuable Expert 2015
Top Expert 2015

Commented:
If your Email appliance is no longer working, why not just disconnect it from the network? If you do this and it works you should no more issues.

Take a look at this link as it illustrates how to Configure Sophos with Active Directory...
http://www.sophos.com/support/knowledgebase/article/14388.html
Architect/Designer
Commented:
which version of exchange is this please?
Could you check your send connector to see if it is sending mail directly (DNS lookups) or sending it to a 'smarthost' (the sophos box)

If its sending to a smarthost (sophos IP) just change it to direct DNS and it will bypass the box completely.

Author

Commented:
hello

thanks for the replies. When I say its not working I mean its completely got no power so its not connected to the network at all(server room air con failure caused it to break). It was integrated into active directory somehow on install but it does it automatically.

We have Exchange 2003. It was set to send to a smarthost (ie the Sophos box) and I have made the change to Use DNS instead and rebooted. This was the only change i had made so far but still no luck
SteveArchitect/Designer

Commented:
Does the exchange server have permission to send directly?
Check if your firewall limits port 25 traffic to the sophos box only.
If this isnt the issue, try a manual telnet test from the exchage server to establish where the problem may lie.

http://technet.microsoft.com/en-us/library/aa995718(EXCHG.65).aspx

Skip 5,6 & 7 if you dont use authenticated e-mails.

Author

Commented:
hi
i have just checked our firewall and it is set up correctly. I'll check out the telnet stuff and let you know how i get on

cheers

Author

Commented:
Hi

its fixed!  I noticed in Event viewer that there were some DNS resolution errors so I after checking exchange I found that there were two external DNS servers set in there. As we haven't sent directly from Exchange for a few years it had our previous ISP's DNS servers set, we switched about a year ago. After removing these,  all seems well.  :-)  

thanks for all your help guys

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