SMTP Authentication
SMTP authentication helps ensure that mail sent from your mail accounts is actually sent by you, thus lowering the possibility of your domain, your IP or your mail server from being blocked by one, or more, of the various ISPs, spam lists, etc., that monitor mail traffic. Enabling SMTP authentication simply means that outgoing mail is validated against the domain the mail is sent from, and that the sender is an actual mail account attached to that domain. SMTP authentication is enabled by default on all hosting Plans.
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