SMTP Restrictions

This server uses 1 linked node. To adjust a linked node’s configuration you must log in to that node directly. This interface will only affect the local server’s configuration. Use the “Link Server Nodes” interface to manage this server’s linked nodes.

This feature prevents users from bypassing the mail server to send mail, a common practice used by spammers.
It will allow only the MTA, mailman, and root to connect to remote SMTP servers.

This control is also adjustable in Tweak Settings.

The SMTP restriction is disabled.