Outlook suddenly refused to allow me to download email. I can send email, and I can download headers, but if I try to read messages from my email server through Outlook, it will simply ignore messages in my server's inbox, although I can see them sitting there when I go into the server through webmail. Message headers will download if I invoke the 'download header feature,' but many times the body of the message will not download. Any suggestions greatly appreciated.

I there something in file/options/trust centre that may prevent downloads?
Are the other send / receive settings correct?
regards,
JOhn

All suggested possibilities regarding settings that might preclude downloading have been examined. I cannot locate anything more that would inhibit downloading of messages.

Maybe try a new Outlook profile and fill in everything needed for it to connect to your email server. If that works you know it's a setting in the other profile or you simply keep using the new profile.