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Securing Sendmail Pro.
Website: http://www.sendmail.com/
Information provided by: Joe Jared
Additional Information: According to Sendmail Pro's website, the difference in operation between sendmail and sendmail pro is a gui interface for configuring sendmail and appear to be working in a coperative venture with McAfee to provide anti-virus solutions. At a future date, there may be more notable differences. In terms of virus protection, this is most notably of interest to Windows clients and ironicly has little benefit to Unix users.