SMTP Connection at Port 25 Failed or SMTP Port is blocked by ISP
If the program fails to verify the email addresses, one of the most likely
reason is that the port 25 is blocked by your ISP. This port is used for
sending and receiving email.
First of all, make sure that port 25 is open. Check it here:
If port 25 is blocked, you can act in the following way:
1) use an external socks proxy server. They are of two types: free (not
trustworthy) and paid.
2) call your your network administrator (if you're working in a company),
and ask to open the port 25.
The other points to check are firewalls or anti-virus software. Enable Email Verifier in the settings of firewall. Switch anti-virus
software before starting the program.
DNS server doesn't work - ISP DNS server refuses MX requests
Use these DNS servers:
Does the program check only domains or also finds dead e-mail
Email Verifier checks not only the existence of domains but also the
existence of email addresses. Actually, it simulates the sending of the
message. The recipient doesn't get anything.
I bought the registration key for Live Email Verifier yesterday
Please contact support, and we will resend it ASAP.