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Thanks Chuck. I think my ISP's server (Eclipse) is playing up, and not recognising the password.
Password is now being rejected on my two PCs as well. Broadband's ok but no email.
So, Webmail I thought. Except that the server rejects on log-in, so I'll have to wait until Monday morning to get them to reset it.
Thanks again, and thanks for the IMAP tip. I know they support it.