My company has an Exchange server which forward outgoing emails to a mailhub, which has a spam filter.
(user)----(company's Exchange)----(mailhub with antispam)----(the world)
It happens that my users send emails with the company's Exchange using their home DSL connections, which quite frequently are blacklisted by RBL lists. The mailhub look at the headers, see the incriminated IP address as the fist hop and drop the message, thinking it's SPAM.
How can I instruct Exchange 2010 to remove the first hop IP address from the headers ?
Thanks.