[Fetchmail-users] Fetchmail vs outlook - missing emails

[<sup...@gm...>]

I wonder if anyone can shed some light on a peculiar problem I have:

I use fetchmail to grab my email off an outlook server and recently we've had a new accounting system added which issues notifications via outlook for things that need to be done.

These notifications end up in my outlook inbox but it appears that fetchmail won't get them.

Looking at the logs I have messages like this:

Jan 06 10:11:19 fetchmail: SMTP error: 553 5.1.8 <XXXX>... Domain of sender address don...@XX...X does not exist
Jan 06 10:11:19 fetchmail: can't even send to XXXX!
Jan 06 10:11:19 fetchmail:  not flushed

Is there any simple way to fix this?