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SMTP Proxy

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This article refers to the Barracuda Message Archiver firmware version 5.0 or higher.

The Barracuda Message Archiver has the ability to act as an SMTP proxy to directly forward messages to your email server if so desired. The ADVANCED > SMTP Proxy  page allows you to enter the IP address and TCP port required to allow the Barracuda Message Archiver to forward emails to your email server for delivery.

Important
Because this feature causes the Barracuda Message Archiver to act as a transparent proxy, you must make sure that the mail server to which you are forwarding accepts the sent messages. If message delivery to the next mail destination server fails for any reason (invalid recipient, mail not accepted from the Barracuda Message Archiver's IP address, etc.) then the message is not archived.

Enable Forwarding

To enable forwarding, on the ADVANCED > SMTP Proxy page, enter the IP address of the desired destination system, and the TCP port to be used for communications. For mail servers, the TCP port is the port used for SMTP traffic, typically either 25 or 587. Messages sent to the Barracuda Message Archiver are stored internally prior to being forwarded to the specified destination for further delivery. Leave these fields blank to disable forwarding.

Host Exclusion List

If you have a system such as a Barracuda Email Security Gateway that is configured to journal mail to the Barracuda Message Archiver, or if you want to prevent incoming messages from certain systems from being forwarded to another destination even when the proxy feature is enabled, you can prevent forwarding of all messages received from this type of system by entering the IP address in the Host Exclusion List field. All messages arriving from sources not listed here continue to forward to the destination listed in the SMTP Proxy Server Configuration section.

Trusted SMTP Servers

You must enter the IP addresses of all trusted senders of SMTP messages to be archived. On the MAIL SOURCES > SMTP page, enter the IP addresses of trusted forwarding servers that will be sending messages to be archived.