If your XCLIENT arguments match Postfix logging, including the name
and IP address info and you used HELO or EHLO depending on Postfix's
proto= logging, then I think that the Postfix SMTP daemon cannot
distinguish between a real intuit.com connection and one made with
XCLIENT.
That leaves the possibility of
- Some Postfix configuration affects intuit.com mail but not other mail.
For example a false match with an inaccurate regular expression!
- Copy and paste problem with message header or body content
- Local DMARC etc. configuration problem
- Sender's DNARC etc. configuration problem
The DMARC logging shouod give an idea of what the problem is.
Wietse
