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.
Example: Mail from: email@example.com
Is it possible to configure the Zimbra Mail Server to reply a mail to the sender because the domain specified "uck.co.de" does not exist?