Starting January 31, 2019, the classic version of Yahoo Mail will no longer be available. At that time, you'll be upgraded to the latest version of Yahoo Mail or basic Mail, depending on your browser's compatibility. Learn more about the latest version of Yahoo Mail.

Received email from a blocked address

Emails from blocked senders can still find their way into your Yahoo Mail if the sending email address was altered. Here's how to spot the true email address from the forged one and how to stop them.

Find the true address in a forged email

  1. View the full headers of an email to determine if the sender info was changed.
  2. Compare the bottom From: address to the address in either the Received or Mailfrom field.
  3. The true sending email address will be viewed in the top most Received or Mailfrom field.

Image of a forged email address in the full header of a raw message.

Stop these messages once and for all