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Routing email back out through originating email server

outbound routing outbound routing

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#1 Lee Simmons

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Posted 06 September 2016 - 08:28 AM



We have 4 email gateway's, 2 per data centre and clustered. The idea was to use them just to scan incoming and outgoing email generated by our application, we were advised that this is possible so we bought them.


What we would like, for outgoing email, is to have the email sent to them from a mail server, have it scanned and then sent back to the originating mail server for sending it on. The only options I have come across are to either use the domains area and utilise it as if all email were incoming (which won't work as I do not know every active domain in the world + there are limits there) or use relay which doesn't do what we need. Is anyone aware of a way to just use the gateway as a simple scanner for outgoing email?


Thanks in advance.

#2 Matthew McIntyre

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Posted 06 September 2016 - 10:15 AM

Hello Lee,

    You could set the barracuda to redirect your outbound email back to the mail server by inputting the senders or domain names on the Block/Accept, Sender Filters tab at the bottom of the page under Redirected Sender Addresses and Domains.


The Help Bubble for that field sounds like it explains exactly what you are trying to do.

"If you want to redirect email from certain senders, domains or subdomains to another gateway, add those email addresses, domains or subdomains here. Or, if you are using an email encryption service, add any email addresses, domains or subdomains for which you want to redirect outbound messages for encryption. You must specify the IP address of the server or service in the Redirection Mail Server TCP/IP Configuration section of the BASIC > IP Configuration page. If you want to relay outbound messages through an alternate mail server to the Destination Mail Server specified on the BASIC > IP Configuration page, you can specify a Redirection Mail Server on that page."


Hopefully this information is helpful.

#3 Lee Simmons

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Posted 07 September 2016 - 03:15 AM

Thanks for this Matthew.


We can use it in a a manner of speaking, it just means the creation of a further Exim container/system that diverts the mail back to the origin server after the Barracuda's have finished their processing (We have more than 2 domains and at more than 1 mail server per domain).