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smtp

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Properly running a mailserver and steps to take after an smtp open

Starting a mail server? The process may take a while and to get mails delivered follow the below steps.

Compare Postfix, Exim, and Sendmail open source SMTP servers for email. Learn about features, setup, security, and best use cases.

TLDR: Any one dealing in SMTP is aware of abuse and spam, and aware that SPAM can lead to ip blacklisting at collateral damage.