Some simple functional tests
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Compose a message
    Attach an image to the message
    Save the message as a draft
    Reopen the draft
    * Is the attachment still there?
    Send the message.
    * Does the received message have the correct attachment?

Check delete functionality on POP and IMAP account.

Check delete functionality on IMAP with no network connection.

Check save draft functionality on POP and IMAP account.

Check save draft functionality on IMAP with no network connection.

Check sent message functionality on POP and IMAP account.

Check sent functionality on IMAP with no network connection.
    * When the network is brought back does the sent message get uploaded?