User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/600.6.3 (KHTML, like Gecko) Version/7.1.6 Safari/537.85.15 Steps to reproduce: Send an email through an outgoing mail server which rejects it as user not authorised. I was away, reset my outgoing mail server to one for my new location, returned home and didn't reset to my own outgoing. Actual results: Message box: Alert an error occurred while sending mail. The mail server responded: <firstname.lastname@example.org> recipient rejected - relay denied. Please check the message recipient <email@example.com> and try again. After clicking OK the email appears in my Sent folder and recipient doesn't receive it. Expected results: The email should have been put somewhere like Drafts or Unsent.