Configuring Sendmail SMTP server on CentOS & Scientific Linux

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http://www.unixmen.com – Sendmail is the default SMTP (Simple mail transfer protocol) server installed on CentOS and although it can be slightly more complicated for beginners to learn than similar alternatives such as Postfix, it can be quite powerful and useful to learn. Sendmail by itself as the name suggests is a MTA (Mail transfer agent) which is useful for sending emails from your server to other servers. However in order to create a proper mail server you will also need a few other pieces of (HowTos)