sending email

From: Date: Wed, 15 Dec 2010 23:55:48 +0000
Subject: sending email
Groups: php.general 
Request: Send a blank email to php-general+get-310068@lists.php.net to get a copy of this message
When I use the mail function on a linux server, how is the email sent? Does sendmail act alone or does it use SMTP? Thanks Marc

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