They ARE helping you by trying to get you away from an old fashioned way of doing things.
Ok enlighten me.
These are the setting BT have on their help page
Basic server settings for BT Yahoo! Mail:
Incoming Mail (POP3) Server - mail.btinternet.com
Port (usually specified in 'Advanced settings') - 110
Outgoing Mail (SMTP) Server - mail.btinternet.com
Port (usually specified in 'Advanced Settings') - 25
no mention of IMAP (I'll have a dig around the site later)
So
POP3
What's good, what's bad
IMAP
What's good, what's bad
What's the difference, why is IMAP better? Is it better or just a different method of managing mail?