smtpd

The name smtpd is a synonym for the -bd command-line switch (-bd on page 234). It causes sendmail to run in the background as a daemon, listening for incoming SMTP mail (Daemon mode (-bd) on page 20). This mode of operation is usually combined with the -q command-line switch (Periodically with -q on page 427) which causes sendmail to periodically process the queue.

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