Welcome to the Archived, Readonly Zimbra Collaboration forums. Here’s the place where we talked about all things related to Zimbra email products. Registrations and postings are disabled here.
Be sure to visit https://www.zimbra.com/forums to start new discussions and to find the latest answers to questions being asked.
Is the a way to implement Domainkeys (DKIM) via MTA or plugin or a specific file to edit pertaining to DKIM.
check out this thread
For what it is worth. There is blog on Zimbra Collaboration Suite integration | Welcome to Mannix4Mail Sydney Australia in respect to that subject.