I'm occasionally seeing the following error: This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: philipp...@xxxxxxxxxxxxxxxxxxxxx (generated from xyzzy@xxxxxxxxxxxxxxxxxxxxx) SMTP error from remote mail server after RCPT TO:<philipp...@xxxxxxxxxxxxxxxxxxxxx>: host mail.redfish-solutions.com [66.232.79.143]: 553 5.1.8 <philipp...@xxxxxxxxxxxxxxxxxxxxx>... Domain of sender address philipp...@xxxxxxxxxxxxxxxxxxxxx does not exist This is on an externally generated email that is coming into my domain (redfish-solutions.com). The mailbox name is valid (it's been munged here to protect against spam address harvesters). Looked at the cf/cf/generic-linux.cf briefly, but it's been too long since I've munged .cf files (these days I cop out and us the .mc versions instead). What's going on, and how do I fix it? Thanks, -Philip -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines