"Message contains invalid header"

[Etienne Goyer]

Hi,

I have a problem with thunderbird and Cyrus 2.2.12.  One of my user is 
trying to transfer messages that have been downloaded from a POP 
account.  When he try to drag the message from his POP account folder in 
Thunderbird to a Cyrus IMAP account folder, he receive an error "Message 
contains invalid header".

Looking at the message source, I can see that this message have an SMTP 
envelope header "From blabla..." at the top.  I guess that this is the 
problematic header.  Is this the case ?  If yes, is there a workaround ?

What is really mystifying me is that some other message that also have 
the "From blabla" header import correctly.  This make me doubt it's this 
particuliar header that is problematic.

Thanks !

Etienne Goyer