When Connect Mail is configure for import attachments only, it will not ignore email with no attachments. Connect to Mail will import all email and those with no attachments will considered a failure and be routed to the default tray, or, have a rule in out look to move email to a different folder and it monitored.

Connect to mail should ignore email with no attached if only attachments are needed. This will help with improving deployment and eliminate clean up maintenance for support people.