Need good vendor to reduce bounce back rate on my email campaign?

Accuracy is the key element when we choose an email verifier. There are many vendors that provide you high accuracy in the email verification. Try MyEmailVerifier for the highest level of accuracy. They provide you 99% accuracy on your data. Also, they provide great support 24/7 if you have any queries. You can also try ZeroBounce(98.8% accuracy) and QuickEmailVerification(97% accuracy).

As per your concern, you need best vendors in accuracy level. So I suggest you to choose Zerobounce and Xverify. They also offer accuracy level as well as best features.

Try Zerobounce, they have 98% plus accuracy(as they claim) but on an average you can count that they will remove around 85% of hard bounce mails.