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Error with every email adress (even my own, working one) | Knowledge Base ▸ eMail Verifier

Error with every email adress (even my own, working one)

Knowledge Base ▸ eMail Verifier

Compatible with MS Windows Compatible with MacOS

Error with every email-adress (even my own, working one)


Question: Hello Support,

I'm trying out your product but I never got good feedback while verifying some emails.

I always get this message:

Nicht autorisierende Antwort:Server:

This also happens if I use my as the DNS.

Is there something I do the wrong way?

thanks for your help!

Answer: Try to use your router address as the DNS server address. You can also use the following DNS servers:


Comodo Secure DNS

Norton ConnectSafe

You will find more information about this issue here: How to fix the Server 'Not Found' error?

Stan Busk Stan Busk
April 10, 2019

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Maintain clean mailing lists checking the validity of recipient's e-mails addresses. eMail Verifier can save time and money for businesses who send newsletters to their clients, nonprofit organizations who send bulletins to their members, or any person or business that needs to maintain a clean e-mail contact list.

eMail Verifier is your powerful solution for the standard "message delivery error." Email Verifier verifies every e-mail address from a given mailing list, allowing you to determine 80-90% of "dead" email addresses.

eMail Verifier works on the same algorithm as ISP mail systems do. Addresses for e-mail are extracted from a Domain Naming Server (DNS) and eMail Verifier tries to connect with SMTP-servers and simulates the sending of a message.

It does not send the message though - eMail Verifier disconnects as soon as the mail server informs the program whether the address exists or not. Email Verifier is a very effective piece of software that can verify over 10 e-mails per second .

It can verify single e-mails or huge lists. (eMail Verifier is multithreaded, providing high speed verifying).

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