Asp.Net Mass eMails Checker

Asp.Net Mass eMails Checker

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Note: Source Code Is Included.
Asp.Net Mass eMails Checker is a simple & easy-use web app 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.


  • Mass mails validation
  • Perfect for verifying your newsletter mails
  • Use the MX records for mails to make sure the mailbox really exists
  • Clean bad emails from your list
  • more ….

Demo Video :

**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).

Some Email Providers Support State :

Supported Providers UnSupported Providers
Gmail – Yandex Mail – Proton Mail – Tutanota Mail – – Sapo Mail – GMX Mail – Mail – Mail – Inbox Mail – Mail – Mail Hotmail- Yahoo – Outlook
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  • 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

Others Source Codes :

Note: Excel must be installed to view the report

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