Recently I invested some bucks on buying some other verifier, and unfortunately was not happy. They did not verify emails from Gmail or any random domains. Does your Advanced Email Verifier verify all sorts of emails?

Unfortunately, there is no cheap and easy solution to accurately verify 30+ million emails.

To verify an email address, our Advanced Email Verifier connects to the recipient’s mail server and imitates sending a message. If the recipient’s server gives a response that the appropriate user exists, the AEV disconnects from the server and marks the email address as good. If the mail server says that there is no such user, the Advanced Email Verifier marks the email address as bad.

But some mail servers are configured as “catchall domains” and accept all messages for all users (valid and invalid). AEV that imitates sending a message thinks that the email address is valid, disconnects from the server and marks this email as good. But actually the email address may turn to be bad.

For example, Yahoo uses this technology. Yahoo returns “Good” result for all email addresses as far as your IP address is new to Yahoo. This means that you may get a number of false positive results when the program tells that the email address is good but in fact that email address is invalid.

Also, please, note that the accuracy of verification results depends mostly on the IP address you connect from. Since the Advanced Email Verifier is desktop software, by default it connects to the recipients’ mail servers from your IP address. If the recipient’s mail server does not like the IP address the connection goes from for some reason (dynamic IP, blacklisted IP, IP with no PTR and Reverse DNS records etc.), the mail server rejects the connection. In this situation, the Advanced Email Verifier marks the email address as “Unknown”.

In addition, some mail servers can give a negative response for a good email address if the IP address the connection goes from misses proper Reverse DNS and PTR records. It is a method of preventing spam.

The mode that gives most accurate results is BPSocks email validation API. BPSocks is the 3rd party service which is integrated with the Advanced Email Verifier. In this mode, the verification goes through BPSocks servers which have proper authentication records and clean IP addresses. So, we recommend that you try BPSocks email validation API to minimize the number of bounce emails.

If the Advanced Email Verifier with BPSocks email validation API does not suit you, you can search for an online email verify service and use it. You can consider, for example, BriteVerify or FreshAddress.

Interested? Learn more about our Advanced Email Verifier.