Joined: 6 Mar 2009 16:53 PST
Hi, I'd recommend you contact our support team about this.
To be honest it was new to me that Yahoo email worked -- the last time I looked into this we couldn't make IMAP connections to Yahoo's mail servers. For that reason Yahoo has never been on the list of supported services for email. I'm guessing that this situation has changed recently if you were able to make it work.