I've been dealing with a frustrating issue regarding email deliverability this week. My outgoing emails to Outlook recipients are getting deferred due to a vague "low reputation" bounce, despite having clean headers and all my SPF, DKIM, and DMARC settings passing. It feels like we're on a niche email blacklist that isn't being picked up by our usual monitoring tools. I came across a database lookup tool that seems to aggregate around 50 different RBLs, but I'm skeptical about how often they refresh their data. I really want to avoid chasing false positives or missing crucial listings. Is it even worth relying on these consolidated scanners to investigate this issue, or should I consider other methods for checking our reputation on those lesser-known lists?
3 Answers
We had a similar situation with a client who didn't realize that sending marketing emails from their main domain was causing issues. They kept creating one-off websites that affected their email reputation because of the multiple links in their campaigns. After switching to a new primary domain and warming it up properly, they got through the rough patch. But they fell back into their old habits, and now they're heading for trouble again. Make sure you check the emails you're sending; sometimes the problem lies there. Also, double-check your SPF; if another service is being abused, it can degrade your reputation.
Which tool or aggregator are you using for the checks?
Microsoft has their own blacklists. If you're having issues sending to Outlook or Hotmail, you should register for their postmaster tools; it's a great resource for diagnosing these kinds of problems.
I did sign up for those tools already. Still trying to match what they show with those smaller lists, though.
I've been using InboxAlly, which looks at about 50 different RBLs. It's pretty quick for initial scans, but I'm worried about the freshness of their data.