As part of our broad-reaching effort to spur the testing and eventual
broad adoption of sender-based email authentication to address fraud
and spam in email, Sendmail, Inc. is releasing an open source
implementation of the IETF's Sender ID specification for testing on
the Internet. This implementation, part of the Sendmail Messaging
Integrity Pilot Program, utilizes the milter interface to plug
directly into the sendmail MTA.
Sender ID is a standards-track proposal that merges Meng Wong's SPF
and Microsoft's Caller ID for email. Authorizations records are
published in DNS in an SPF-like format, and then used to validate
user-visible message headers using the Caller ID "Purported
Responsible Address". This sid-milter release implements the
marid-protocol and marid-core draft standards, leaving the
marid-submitter SMTP Extension to be implemented directly by the
sendmail MTA.
To speed the adoption of sender-based messaging authentication
schemes, Sendmail is aggressively testing these implementations in the
Messaging Integrity Pilot Program. The goals of this program are to:
* Deploy and test milter-based implementations of sender
authentication schemes like Sender ID and DomainKeys.
* Encourage diverse user communities to thoroughly test different
sender authentication approaches using real-world use cases.
* Share and publish results in a community forum purpose-built
to share ideas about email authentication.
Sendmail is actively seeking participants and feedback for this Pilot
Program. For more information about how you or your organization can
get involved in piloting the next generation in fraud and spam
protection software, please visit:
http://sendmail.net/
The milter for testing Sender ID is available at:
http://sendmail.net/sid-milter/
The MARID Working Group charter, along with links to all Sender ID
related proposals is at:
http://www.ietf.org/html.charters/marid-charter.html
The SPF web site is located at:
http://spf.pobox.com/
Microsoft's Sender ID page is located at:
http://www.microsoft.com/senderid