Hi,
I have several senders that use multiple subdomains; for example rei.com and email.rei.com, and email1.americanexpress.com and email2.americanexpress.com. I put the parent domain to the exclusive sender field, but it gets ignored and the message count is decreased.
Now, looking at raw headers I see that amex is actually sending the mail from a host other than the one specified in the From: header (aexp.com). Could this be the source of the problem? However, rei.com appears to send mail from rei.com (but I see some strange address in the Message-Id: header).
So, I am not sure if this is the problem of subdomains or mismatched exclusive sender. (Could you tell me which headers are checked when trying to match an exclusive sender?)
Thanks,
Martin