The program does not verify any address

Question: The program does not works. When I start to check the addresses it says: No reply. Text failed (yellow ball). Why?

Answer: Do you have access to port 25? eMail Verifier actually requires full access to port 25 in order to work. Your Internet Provider may be blocking the access to that port.

I recommend you to read the following blog post: Why eMail Verifier loves port 25 so much. It explains what port 25 blocking is and how to find out if that problems affects you.