Always at SMTP ValidationLevel


Hi there,

This is kevin. I've try the trial version of Email Validator and find a issue of validating email.

I use some real email address like, etc.

But when I test it, the result is always ValidationLevel.SmtpConnection. I don't know why, is it my local configuration issue?

Many Thanks,







edited 11/30/2017 4:15:22 AM
asked 10/28/2013 2:00:52 AM
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1 Answers


There are some reasons for that:

- Firewall blocks that operation (likely on port 25)

- The ISP blocks the email validation operation

- The Email servers recognize your IP range as black ones.

answered 11/16/2017 12:41:36 AM
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