This occurs when my IP is 'blocked' by a RBL rule. I have to wait now because I have dynamic IP. I have administration acess to the email server, maybe I can 'simulate' this behavior.
-- Misleading error message when sending a email that the server rejects https://bugs.launchpad.net/bugs/178773 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs