Hi I have the same problem - but not always. In other Forums this Bug (https://bugzilla.redhat.com/show_bug.cgi?id=587075) has been reported. The problems are dashes and äöü in subject line. Not sure though if that's your problem.
** Bug watch added: Red Hat Bugzilla #587075 https://bugzilla.redhat.com/show_bug.cgi?id=587075 -- Error while Sending message. Could not send message. https://bugs.launchpad.net/bugs/645481 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
