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Can my Barracuda Message Archiver act as an SMTP proxy? How would I set that up?

  • Type: Knowledgebase
  • Date changed: 7 months ago
Solution #00003556

Scope:
All Barracuda Message Archivers, firmware versions 1.2 and above.

Answer:
If you like, you can direct all of your incoming SMTP mail messages through the Barracuda Message Archiver on their way to your mail server. If the Barracuda Message Archiver is configured to do this, it will archive all mail it receives before forwarding it to the configured mail server. However, if mail directed to the Barracuda Message Archiver has not yet been filtered for spam and viruses, the Barracuda Message Archiver will end up archiving all of those extra messages - which will place a heavy load on the Barracuda Message Archiver and waste storage space. Furthermore, attempting to archive all spam and virus email in a situation where all mail travels through the Barracuda Message Archiver will likely significantly delay incoming mail.

To configure the Barracuda Message Archiver as an SMTP proxy, go to the Advanced > SMTP Proxy page of the Barracuda Message Archiver's web interface and specify your destination mail server and port as the IP Address and TCP Port. Messages sent to the Barracuda Message Archiver will then be stored internally prior to being forwarded to the specified destination for further delivery. After ensuring your mail server will accept mail from the Barracuda Message Archiver, you should then direct your incoming mail to the Barracuda Message Archiver. Again, the incoming mail should first be filtered by a system like the Barracuda Spam & Virus Firewall to ensure the Barracuda Message Archiver does not become overloaded with spam email.

To archive your outgoing mail, the easiest way would be to configure your mail server to send a blind carbon copy (BCC) of every email to the Barracuda Message Archiver using the address archiver@<IP> (where <IP> is the IP address of the Barracuda Message Archiver). Alternatively, with the SMTP proxy feature configured, you could configure all of your users' mail clients to send mail to your Barracuda Message Archiver instead of your mail server. When the Barracuda Message Archiver receives the mail, it will archive it and forward it to the mail server, just as it would incoming mail. In this scenario, your mail server would receive all mail from all users from the Barracuda Message Archiver and would then be responsible for sending the mail to the addressed recipients.

Additional Notes:
Leaving the IP Address and TCP Port fields blank on the Advanced > SMTP Proxy page will disable the SMTP proxy feature. If you turn off SMTP proxy without first disabling the inflow of mail to the Barracuda Message Archiver, then messages sent to it will not be delivered to their final recipients. You should stop the delivery of email to the Barracuda Message Archiver before turning off this feature.

If you would like to prevent forwarding of messages sent from certain servers, you can specify the hostnames or IP addresses under the Host Exclusion List heading. For example, if you have configured your Barracuda Spam & Virus Firewall to journal mail to your Barracuda Message Archiver, you would want to enter the IP address of the Barracuda Spam & Virus Firewall in this list.

Link to This Page:
https://campus.barracuda.com/solution/50160000000HKCeAAO