The OpenDKIM Project is a community effort to develop and maintain a C library for producing DKIM-aware applications and an open source milter for providing DomainKeys Identified Mail (DKIM) service.

DKIM provides a way for senders to confirm their identity when sending email by adding a cryptographic signature to the headers of the message.

This package contains the OpenDKIM mail filter (Milter) for plugging into Milter-aware MTAs. It implements both signing and verification.