Hi,
"Unfortunately, after reviewing the information you provided and in
compliance with our mail policies, we are unable to offer immediate
resolve for your deliverability issue."
Will give them credit though for the timing in their response, received
it a few hours later after submission.
I had the same issue in which they were unable (or unwillig) to resolve
it, and wouldn't have "the liberty to discuss the source of the block".
Creating a new ticket some weeks later and they solved it without
discussion.
Regards
Bjoern