According to upstream this due to the fact that the file was not modified and mutt looks at the mtime of the file to determine whether or not to send it. Additionally it was marked as Won't Fix in Debian.
** Changed in: mutt (Ubuntu) Status: Triaged => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/691194 Title: using "-i" to include file in body mutt exits if mail file not saved again in editor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutt/+bug/691194/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs