Andrew,
Thanks, you led me to the solution.
Running $ fetchmail -cv told me that my POP3 account was inactive, and
when I called my provider (Web.com), they informed me that the value
of the poll line in .fetchmailrc had to be changed now to my domain
name rather than the server name.
I suspect they alerted me to the change by sending me an HTML message,
which I tend not to read because I use a text-based mail reader.
--
Haines Brown, KB1GRM