OpenDKIM
DKIM signing and verification filter for mail servers
OpenDKIM is an open-source implementation of the DomainKeys Identified Mail standard that signs outgoing mail and verifies incoming signatures. It runs as a milter alongside Postfix or Sendmail.
Key features
- DKIM signing and verification
- Milter integration
- Works with Postfix and Sendmail
- Lightweight daemon
Strengths
- Released under the BSD-3-Clause license
- Written in C
- Tiny footprint — runs in 64 MB RAM
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