Mirror mail

You're referring to "Mirror Mail"!

Mirror Mail is a type of email that is sent to a recipient's email address, but it appears to be sent from the recipient's own email address. This can be done using various techniques, such as:

  1. Email spoofing: The sender forges the "From" field of the email to make it appear as if it was sent by the recipient's email address.
  2. Email forwarding: The sender sets up an email forwarder to redirect the email to the recipient's email address, making it appear as if the email was sent by the recipient.
  3. Email relaying: The sender uses an email relay service to send the email through the recipient's email server, making it appear as if the email was sent by the recipient.

Mirror Mail can be used for various purposes, such as:

  1. Spamming: To send spam emails that appear to be sent by the recipient's email address, making it harder for the recipient to identify and block the spam.
  2. Phishing: To send phishing emails that appear to be sent by the recipient's email address, making it harder for the recipient to identify and avoid falling victim to the phishing attack.
  3. Email marketing: To send targeted email campaigns that appear to be sent by the recipient's email address, making it more likely that the recipient will open and engage with the email.

However, it's important to note that using Mirror Mail can be illegal and unethical, as it can be used to deceive and manipulate recipients. It's essential to respect email privacy and security, and to only use email in a way that is transparent and respectful of the recipient's rights.