I can recommend you www.zerobounce.net . They have a bulk email verifier that has the following accuracy rates at a minimum:
96%+ Accuracy rates on AOL, Yahoo, and office 365 email accounts.
98%+ Accuracy rates on everything else.
You can also integrate the API in … (more)

HI! You can try www.zerobounce.net  is the leading online email validation platform created to ensure companies avoid email bounces. This is accomplished by identifying invalid, abuse, spam-trap, and other hard bounce email addresses. We also provide a real-time API for … (more)