I tried with lucid Live-CD and had the problem with thunderbird too. The error message was:
Sending of message failed. The message could not be sent because the connection to SMTP server mail.gmx.net was lost in the middle of the transaction. Try again or contact your network administrator. -- thunderbird - mail with attach https://bugs.launchpad.net/bugs/570375 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