I had so much to do today: instead, I've spent the entire morning begging IT services for help. They've been very kind, but couldn't fix my email. Who could? @drleehw, colleague and geek, who suggested moving from POP3 to IMAP. Mr Mockapetris is the evil nerd who invented SMTP, the cause of all my problems.
Sorry for the acronym overload. It's been a very trying morning indeed.