Created attachment 104613 [details] Failed to Send Mail When I tried to send an e-mail "Failed to Send Mail" popup window appears with APPEND Failed: Folder doesn't exist. (Failure) Screenshot attached.
Specify a mailbox that exists in your settings and the message will go away. We don't do autodetection yet.
Where to specify? I haven't find any setting where I can specify mailbox.
menu -> IMAP -> Settings -> SMTP -> Sent Folder Name
*** Bug 414865 has been marked as a duplicate of this bug. ***