Sorry, I had to restrict email validation a little.
I've had this form here for over 10 years, and helped people validate thousands of email addressess during that time.
We were even #1 on Google for "Email validation". Crazy!
Unfortunately, a few spammers have ruined it for everyone, and because of this, the tools and methods used here are causing my server to be regularly blacklisted.
Read this article for more details: Backscatter by Sender Callouts (Sender Verify / SAV) - Why it is abusive.
In order to restrict traffic to real people I now require a donation to access the email validation page. I'll leave it up to you how much to donate - even $10 would be cool. Simply make a donation using the PayPal button below and you'll get permanent access.
*** NOTE YOU CAN ONLY VALIDATE *ONE* EMAIL ADDRESS AT A TIME USING MY FORM - NOT BULK VALIDATE.