How to Access Sent Mailbox

Have the IMAP object keep a session log by setting the imap.KeepSessionLog property = true, then examine the imap.SessionLog property after the search. (Make sure KeepSessionLog is on prior to the call to SelectMailbox.)

You'll see the exact IMAP commands and responses. If you see the Sent mailbox correctly selected, and then you see the expected SEARCH command, and if the response indicates 0 messages, then there truly are 0 messages in the Sent mailbox. At that point you have to ask yourself why you might think otherwise. What are you looking at that makes it seem like there are actually messages present? Perhaps they are local copies of email no longer on the server? If using GMail, then see this: http://www.cknotes.com/?p=218