Overview #

MTA is an acronym for Mail Transfer Agent. Postfix is the MTA used in Mailborder as it is one of the most secure MTA servers available. While very granular and a highly configurable product, the Postfix configuration options in the Master GUI are limited to only a few options that are enough for most administrators. The Postfix configurations on Mailborder servers are built automatically, which provides a consistent and secure environment. 

Configuration Options #

The configuration is in the Master GUI here: [ top menu > transport > mail transport settings ]

Maximum Email Size #

The maximum size for any email including all attachments in bytes. Any email exceeding this size will be rejected and will not be quarantined. Default setting: 52428800, which is 50mb.

Internet Protocol #

The internet protocol used by the MTA during SMTP transactions. IPv4, IPv6, or ALL. If IPv6 is not configured for your environment, the option should be set to IPv4. Default setting: ipv4