XP (UK version), Thunderbird and YPOP.
YPOP can read the emails (round 65) from my yahoo account but crashed afterwards. Sending emails is not possible.
Any time I try to send an email I get the following error msg: Server Response: '554 Mailbox unavailable.'. (Account: '127.0.0.1', SMTP Server: '127.0.0.1', Error Number: 0x800ccc6f. Later when I tried to send again I got an error msg from YPOPs! that sd: Yahoo reported "Mising credentials" error - try lowering your cookie timeout in half ("Keep session alive" under Session) and restart ypops.
