The Sambar Server includes an SMTP server for receiving and routing mail. Local mail delivery, alias expansion, sender verification, and mail forwarding are supported, the server includes a mail transfer agent MTA for remote mail delivery via SMTP transport. The message spool is specified by the Spool Directory configuration parameter. This directory acts as a staging post for messages. In the event of a server failure, all files in the spool directory are delivered when the server is restarted.
Local mail is dispatched to the appropriate mailboxes by the router daemon.
The Fetcher daemon will retrieve mail queued for local users from their respective ISP accounts. If the mail message is still not delivered to all recipients after 2 days, a bounce message is returned to the sender. To use the Sambar Server MTA, the DNS Primary and DNS Secondary must be properly configured in the config.ini file. These entries indicate the DNS servers that should be used for MX-Record lookup. By default, if no Unknown Mailbox is configured, the mail sent by the client to a local mailbox that does not exist is rejected in real-time.