[Fetchmail-users] Fetchmail suddenly downloading the same messages over and over

[Rick H. <ric...@ya...>]

Hi,
Been a constant user of fetchmail for many years now without issue but suddenly today it is now stuck in a loop constantly downloading all the messages off the remote POP3 server over and over.
My /etc/fetchmailrc config has not changed nor has the machine fetchmail is running on received any software updates in some months.
Here is a syslog snippet:fetchmail: reading message ric...@po...:1919 of 1919 (51608 octets) not flushed
fetchmail: 1919 messages (1919 seen) for rickharris at pop.mail.yahoo.com.au (384268734 octets).
fetchmail: reading message ric...@po...:1 of 1919 (11191 octets) not flushed
fetchmail: reading message ric...@po...:2 of 1919 (9625 octets) not flushed
<snip>...and onwards forever downloading the same messages over and over again.
/etc/fetchmailrc
set postmaster "postmaster"
set no bouncemail
set no spambounce
set properties ""
set syslog
set invisible
poll pop.mail.yahoo.com.au with proto POP3
       user "rickharris", with password "...", is "rickharris" here, nofetchall keep limit 20240000
       ssl

The 'nofetchall' option was added after reading http://www.fetchmail.info/fetchmail-FAQ.html#O9 but has done nothing to fix the problem.
I am not able to test removing the 'keep' option as I wish to keep the messages on the remote server (and it's always worked previously).
Any guidance as to what might be causing this?
The only workaround I have so far is to stop using fetchmail when I'd really like to continue using it.

Regards,Rick