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How to verify yahoo Email ID using telnet if server has enabled catch-all ?

by Onlive Server
3 replies
anyone know, how to verify yahoo email id by telnet commend. i am facing issue with Yahoo Server because yahoo is enable catch-all email account and when i send request to yahoo mail server for checking 250 response code but yahoo is accepting all mails.

telnet yahoomail server 25
helo any domain name
MAIL FROM: <yourmailbox>
RCPT TO: <anymailbox>
#catchall #email #enabled #servr #telnet #verify #yahoo
  • Profile picture of the author DIABL0
    Yahoo initially returns 250 for all recipients and won't return if the email ID is actually invalid until you complete all steps for sending a message.

    You can test this by using like a 50 character email ID that's just jibberish you know will be invalid and won't get sent the message.
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    • Profile picture of the author ProducerK
      Originally Posted by DIABL0 View Post

      Yahoo initially returns 250 for all recipients and won't return if the email ID is actually invalid until you complete all steps for sending a message.

      You can test this by using like a 50 character email ID that's just jibberish you know will be invalid and won't get sent the message.
      Diablo hit the nail on the head. There is no really good way to effectively verify yahoo emails without sending them an email.
      Some of the verification services do have methods they use, but I imagine they are actually sending an email to verify its existance.
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  • Profile picture of the author DIABL0
    I have a program that can verify yahoo emails.

    However, it can't identify an address that has recently become permanently invalid.

    So a small percentage of false positive could exist.

    It will catch fake addresses and any invalid older than a couple months.
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