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How can I validate Hotmail and Gmail email addresses? | Knowledge Base ▸ eMail Verifier

How can I validate Hotmail and Gmail email addresses?

Knowledge Base ▸ eMail Verifier

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How can I validate Hotmail and Gmail email addresses?

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Question: Hello, I am about to buy eMail Verifier but I have some questions. Can I validate Hotmail and Gmail email addresses?
I installed the test version and I get error 103 I'm sure my port 25 is not blocked... Thanks.

Answer: You can't really test Gmail nor Hotmail email addresses. Actually, those servers, as most free mail servers will validate absolutely any addresses, good or not. I mean, both Gmail and Hotmail servers will always tell you the addresses you are testing are good!

Those mail servers never cooperate and as a result, addresses will be marked as valid. They are configured in a way they prevent anybody to find out if an e-mail address is good or not, mostly to protect their customer e-mail addresses from harvester tools.

eMail Verifier already offers a list of non-cooperating servers in the preferences, 'Rules' panel. You can add more servers to the list. That will speed up the verifying process since no connection will be made to those servers.

How can I validate Hotmail and Gmail email addresses?

Consider eMail Verifier as a tool for tracking bad e-mail addresses instead of validating good ones. It is always a plus to have as few bad email addresses in a list as possible. It would be terrific to be able to detect all those dead email addresses and generates 100% clean lists. Unfortunately, that is no longer possible. Anyway, it is highly recommended to clean your lists with eMail Verifier since a high bounce rate can flag your message as spam in given systems.

It is also explained here: Bad e-mail addresses are sometimes marked as valid.

About error 23 and port 25 blocking I recommend you to read this page: Port 25 blocking effects on email validation.



Stan Busk Stan Busk
October 13, 2020





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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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