Hello...

The message from your system triggered a rule in our mail system that
looks for subject lines containing data that is typically used to track
user behaviour after reception of the email. This rule is in place to
protect the integrity of our email system, and in turn, the privacy of
our users. This being the case, we will not be whitelisting the IP
addresses you have included at this time.

We are willing to review any further message data that you may have. If
you wish, you may submit a message with full unadjusted headers as an
attachment to xxx with a CC to xxx.

At this time, the only solution that we can offer to our user is to use
an alternate email address xxx