Bij Sendmail.org is Sendmail 8.13.0 te vinden, de freeware mailserver. De vele veranderingen staan in een lang changelog en is hier te vinden. De meest belangrijke nieuwe features worden als volgt omschreven:
Some of the interesting new features are:
- New map "socket" to query maps via TCP/IP sockets.
- Connection rate control as well as control over the number of incoming open connections.
- Several LDAP enhancements such as LDAP recursion and LDAP URI support.
- Message quarantining.
- AUTH EXTERNAL will only be enabled if STARTTLS was successful and the client has been authenticated, i.e., " rel="external">verify is OK.
- Basic support for certificate revocation lists.
- New queue timeouts for DSN messages.
- Experimental support for MTAMark.
