I'm also beta testing the POP3 implementation I've found a problem: with hotmail I need to leave the session open otherwise i'll get the error "too many connection in small amount of time" when try to fetch mails. Unfortunately by keeping the session open new mails will not be listed by getUidls… I need to close session to get new email.. Do you know the reason for that?
Yes, the POP3 protocol is designed such that a session has an unchanging snapshot of the POP3 mailbox. This is not a design of Chilkat, but rather the design of the POP3 protocol itself. The only way to see new emails is to disconnect and re-connect.