Thanks for the clarification. I just received this "reject" notice when sending a test msg. So, if I understand correctly, it is non-deliverable from the outside world and can simply be used as the "From:" address in my MUA? <ckrzen@xxxxxxxxxxxxxxxxx>: host mx1.redhat.com[209.132.183.28] said: 550 5.1.1 <ckrzen@xxxxxxxxxxxxxxxxx>: Recipient address rejected: User unknown in local recipient table (in reply to RCPT TO command) _______________________________________________ infrastructure mailing list -- infrastructure@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to infrastructure-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/infrastructure@xxxxxxxxxxxxxxxxxxxxxxx