[fetchmail]Topic: Email lost, SMTP error: 553 ... Domain name required

Hello Everybody,

I hope you will help me with a problem I have with my fetchmail v.5.0.4 on my 
linux server.
In fact some mails answered with reply from Lotus email messenger never arrive 
to my PC client.
In the traces of my fetchmail (email server) I can read SMTP error: 553 ... 
Domain name required 
because in the from field there is <root> (original email adress disappeared).

I'm sure you will have the answer to this topic.
Thanks.
Best regards.
Chevi.