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The sendmail daemon is listening on port 587 as well as the standard port 25! What is going on?

April 26, 2017daemon going listening port sendmail standard

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The sendmail daemon is listening on port 587 as well as the standard port 25! What is going on?

1 Answer

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Recent versions of sendmail support a mail submission feature that runs over port 587. This is not yet widely supported, but is growing in popularity.