Asp.Net Super eMail Checker is  a simple & easy-use web application that allows you to verify email addresses without storing anything in any databases. It extracts the MX records from the email address and connects to the mail server (over SMTP and also simulates sending a message) to make sure the mailbox really exists for that user/address.

**Some mail servers(see the section below to see some of the unsupported Email Providers) do not cooperate the verification process with the MX records, in such cases, the result of this email verification tool may not be as accurate as expected (1% error margin).

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Note: Source Code Is Included.

Some Email Providers Support State :

FAQ

• Which port is necessary to be open? the port 25
• What software I must have? Visual Studio to edit the source code if you want and Excel to generate & view the reports
• The validation doesn’t work? there are many reasons but the general solutions are: Run the program as administrator, Disable the firewall, open port 25, update your system

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