lmtp delivery - headers missing

[Rafe Slattery]

Hi,

I am having a problem with Cyrus and message delivery...

I have tried Exim and sendmail and both are showing pretty much the same 
issue.... Mails are arriving without some headers.

In the case of Sendmail which is the one I currently have active and am 
working with, the To: header is not visible in my mailer (have checked 
with thunderbird and outlook).

I have spotted one or two others with this problem but noone seems to 
have posted a solution.

This is running on a RHAS 4 box.

Sendmail v  8.13.1
Cyrus  v2.2.10

Any pointers really appreciated.

Regards

Rafe