DKIM Email Sender Authentication for Inbound Message Protection
The DomainKeys Identified Mail (DKIM) Internet standard enables email senders to digitally sign their email messages so that receivers can verify that those messages have not been forged. The DKIM sender authentication scheme allows the recipient of an inbound message to confirm a message originated with the sender's domain and that the message content has not been altered. A cryptography-based message protection solution, DKIM provides businesses an industry-standard method for mitigating email fraud and protecting an organization's brand and reputation at a relatively low implementation cost.
The DKIM base specification is being spearheaded by Sendmail, Inc. in conjunction with Cisco and Yahoo!
DKIM-MILTER
Sendmail, Inc. has released a free, Open Source implementation of the DKIM signing and verifying message software. A portable API is available to allow DKIM to be embedded into any application. Also provided is a "
milter" (mail filter) plugin for Open Source sendmail, the world's leading Mail Transfer Agent (MTA). The milter plugin allows system administrators to easily sign and verify messages using DKIM signatures. The DKIM-milter is supported by:
For more technical details, to download the DKIM API and milter, or to contribute to the DKIM project, go to the
Sourceforge project page. More information is also available at
dkim.org.
Press Release: DKIM IETF Approval
Press Release: DKIM Product Announcement