Alex #21 wrote:

we have a little problem with the to: field in our emails. Sometimes
when we receive an external email the to field is missing. It looks
like this:

From: "Mueller, Karl"
Sender: "Lenzen, Karl"
Comments: Original 'to' not compliant with RFC 822, stripped
Comments: Original 'to' not compliant with RFC 822, stripped

Is it possible to see where the email header is going to be modified
or if the external exchange server generates this weired email header?

I don't know if Exchange can log incoming message data, but if it can, I'd
see if it will show you the raw message as it came in. If so, then you can
determine if it's Exchange or an upstream router doing the stripping and
adding the comments.
--
Brian Tillman