LINUX MAIL TRANSPORT AGENTS

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The Mail Transport Agent is responsible for delivery of mail to its destination. The Mail Transport Agent delivers local mail to mailboxes (directly or via a Mail Delivery Agent) and forwards remote mail to the recipients Mail Transport Agent.

ssmtp		A simple Mail Transport Agent
esmtp		A relay only Mail Transport Agent
msmtp		An SMTP client
exim		A Mail Transport Agent
qmail		A Popular Mail Transport Agent

Not Used

sendmail		A Traditional Mail Transport Agent
smail		A Mail Transport Agent supporting UUCP and SMTP

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