Emailed stamp

You're referring to an "email stamp"!

An email stamp is a digital representation of a physical stamp, used to authenticate and verify the authenticity of an email message. It's a way to add a digital "seal" to an email, similar to how a physical stamp is used to authenticate a letter.

Email stamps can be used for various purposes, such as:

  1. Authentication: To verify that an email message is genuine and has not been tampered with.
  2. Tracking: To track the delivery and receipt of an email message.
  3. Proof of delivery: To provide proof that an email message has been delivered to the intended recipient.
  4. Security: To add an extra layer of security to an email message, making it more difficult for hackers to intercept or alter the message.

Email stamps can be created using various digital tools and platforms, such as:

  1. Email clients: Some email clients, like Microsoft Outlook, offer built-in email stamping features.
  2. Email marketing platforms: Many email marketing platforms, like Mailchimp, offer email stamping features as part of their services.
  3. Third-party apps: There are also third-party apps and plugins available that offer email stamping capabilities.

When an email stamp is applied to an email message, it typically includes information such as:

  1. A unique identifier: A unique code or identifier that can be used to track the email message.
  2. A timestamp: The date and time the email message was sent.
  3. A digital signature: A digital signature that verifies the authenticity of the email message.
  4. A message digest: A message digest that verifies the integrity of the email message.

Overall, email stamps provide an additional layer of security and authenticity to email messages, making it easier to verify the legitimacy of an email and ensure that it has not been tampered with.