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A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature on a message gives a recipient confidence that the message came from a sender known to the recipient. [1] [2]
In the early 1980s, when Simple Mail Transfer Protocol (SMTP) was designed, it provided for no real verification of sending user or system. This was not a problem while email systems were run by trusted corporations and universities, but since the commercialization of the Internet in the early 1990s, spam, phishing, and other crimes have been found to increasingly involve email.
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A valid signature also guarantees that some parts of the email (possibly including attachments) have not been modified since the signature was affixed. [2] Usually, DKIM signatures are not visible to end-users, and are affixed or verified by the infrastructure rather than the message's authors and recipients. DKIM is an Internet Standard. [3]
AOL Mail provides a comprehensive set of tools designed to help you craft a distinctive and memorable email signature. Whether you're personalizing fonts, adding images, or formatting text, AOL Mail offers a wide range of options to ensure your signature reflects your unique style and professionalism. Add a signature
Screenshot of a Gmail inbox, showing a blue check mark next to the email sender's name (Google, in this case). A pop-up message reads, (Google)
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