I had a previous email validation tool and in the last 2 days purchased ZeroBounce and Reooon. My previous tool: Email Validation List has been sufficient until just recently and it may be a fluke, but I need to change CRM platforms so ran all my contact in their system and 64% were "unknown". Ran it again and it gave slightly better results but considering most of mine have been for gift giveaways and knowing I had open rates better than that I didn't feel confident, so I purchased Reoon. Way, way better, and while there weren't too many "unknowns" - before I uploaded them to my new system, I just wanted to be sure, so purchased Zero Bounce. It only validated a few more, just a few, so Reoon was just fine for validation purposes.

Then as I was playing around with ZeroBounce, I saw their scoring tool. Originally I was just going to run the unknowns through them, but decided to run my entire list and glad I did. When you switch to a new platform, there is a warmup process one should go through and you want to minimize bounce rates. With the scoring, I was able to tag each contact by score, I completely deleted the few that had a score of 0, and as I begin to send emails, I'll start with 9's and 10's and go from there. So while I'll use them as a secondary check, the scoring tool is so helpful and that part alone deserves 5 Tacos!