Symptom: Outlook reports the following error – Sending’ reported error (0x80040119): ‘The message cannont be saved to you IMAP e-mail account Sent Items forlder, because Outlook is offline or the e-mail server doesn’t allow items to be saved to the Sent Items folder’

Solution:

• Go to File-> Account Settings-> Account settings-> (YOUR EMAIL ACCOUNT) -> Change…-> More Options…-> Advanced
• Set Root folder path to “Inbox” and force a Send/Receive

This fix should allow you to now automatically sync with Squirrelmail, Round Cube, or Horde.