Sendmail is the traditional unix message transfer agent (MTA). It listens on remote connections for incoming emails on connections, handles local delivery (possibly with the help of an MDA, and sends locally-originating email.

Sendmail is no longer the de facto standard MTA; alternatives include , , , etc. These programs provide a command called sendmail (usually located in /usr/sbin) for compatibility.

Use this tag if your question is about Sendmail. If your question is about another MTA, use the tag for that MTA instead. If your question is about sending mail in general, see the tag .

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