Verify the existence of email id

We can verify the existence of email address using some Linux commands.

For example here we are verifying the mail-id

Step1: Find mail server of domain

#dig mx

Let the mail server of as

Step2: Connect to the mail server using telnet command as follows.

telnet 25
Connected to
Escape character is ^]
mail from: <>
250 2.1.0 Ok
rcpt to: <>
550 5.1.1 <>: Recipient address rejected: User unknown in virtual alias table
221 2.0.0 Bye

Please note that we could not assure 100% result in this method as some mail providers like, are blocking these kinds of email verification process.


Leave a Reply