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Our dedicated IP address has been blacklisted by SORBS twice now, and I'm looking to avoid repeat offenses. However, it's difficult to say what kind of behavior landed us on that blacklist. We don't purchase lists, and we use a double opt-in verification process, so the culprit must be a recycled spam trap, right?

I understand that the whole point of spam traps is to improve your sending habits so that you don't hit the traps or any unengaged inbox that behaves the same way, but I don't know what SORBS considers a sign of an inbox being "unengaged". And I need to be able to advise my client on the most efficient plan of action, whether that's suppressing addresses after 1 hard bounce, suppressing people who haven't opened in a while, or something similar. I just don't know how SORBS's spam traps behave. Do they open? Do they bounce?

We send multiple deployments per day out of our account, and I believe the "date" that SORBS reports isn't necessarily accurate to the date or time of the send. That makes it difficult to track down which of our deployments needs fixing. SORBS does provide part of the message-id that resulted in the block. I can see a similar message-id in the header of the emails I receive from our Salesforce account. Is there any way I can access the message-ids inserted by Marketing Cloud's MTA for each email sent? Ideally I would be able to search through the list of message-ids for the partial characters provided by SORBS.

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