Whether you admin Exchange, Sendmail, MailEnable, Lotus Notes, or any other Internet email system, there are certain things that all these systems have in common. There are certain configurations that must be supported, and others that must not be, which newly live systems often miss. Whether you are an experienced admin, or  relatively new to the world of email, the seven deadly sins of mail server misconfiguration can pop up and bite you. Take heed, and check your systems to ensure you are good to go. Failing to do so can result in very bad things, like being added to DNS Blacklists.

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