OpenDKIM 2.10.3
OpenDKIM is an open source implementation of the DKIM (RFC6376) email sender authentication system, derived from dkim-milter. It also supports ADSP/RFC5617, Vouch by reference/RFC5518, and experimentally ATPS/RFC6541. It works with any MTA supporting the sendmail milter API, such as Postfix. OpenDKIM provides a Lua-scriptable policy engine, LDAP and SQL database support, and statistic/reporting tools.