Obviously, the complications of conforming to the various anti-spam mechanisms are things all of us in the mailing business have to deal with, and I'm asking for feedback. I have cleaned our data to the best of our ability, and we operate in accordance w/ opt-in customers only, staying on top of email hygiene and using smart mailing practices like using DKIM; and I will be implementing feedback loops (will check out http://www.mailerforum.com/forum/showthread.php?3685-(Links)-Email-Feedback-Loop-Links-FBL) soon, but FIRST.... ...first I need to figure out to reset all the bans I've incurred while running with dirty data. Different IPs and domains have been blacklisted by different services. Spamhaus has a fairly reasonable method to request SBL and DBL removal, not that I've ever noticed it has worked beyond the 3-day reset. Reoccurs on occasion, though. Then there's CloudMark, and I'm not sure exactly what might be keeping my emails from reaching customers. I've been getting a lot of 554 5.7.1 SMTP codes. Are there any tools or "cheat sheets" you might direct me to, that I may not already have? Appreciate the feedback.