What is MIMEDefang?
MIMEDefang is a software program for sendmail-based mail servers that implements antispam, antivirus, and other customizable filtering on email messages. MIMEDefang uses sendmail’s built-in milter, or mail filter, interface to individually inspect, scan, modify, and optionally reject or discard email messages as they pass through the mail server. MIMEDefang is designed specifically for sendmail, and is not compatible with other mail transport agents. MIMEDefang provides an interface between sendmail and other mail scanning software, and when combined with spam filtering software and antivirus software, MIMEDefang provides a complete, robust, and configurable solution for spam filtering, virus scanning, and other email filtering. A typical MIMEDefang installation consists of sendmail, MIMEDefang, SpamAssassin, and one or more open-source or commercial antivirus scanners.