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Callback verification, also known as callout verification or Sender Address Verification, is a technique used by SMTP software in order to validate e-mail addresses.The most common target of verification is the sender address from the message envelope (the address specified during the SMTP dialogue as "MAIL FROM").
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.
DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect forged sender addresses in email (email spoofing), a technique often used in phishing and email spam. DKIM allows the receiver to check that an email that claimed to have come from a specific domain was indeed authorized by the owner of that domain. [1]
• Viewing from web-based email - Emails from AOL will include icons that will indicate it is either Official mail or Certified mail, depending on the type of email you received. • Viewing from 3rd-party apps - The AOL icons won't appear in apps, even if the email is truly from us. Check the sender's email address without opening the email ...
AOL protects its users by strictly limiting who can bulk send email to its users. For more info on sending bulk mail to AOL members, check out the Postmaster info page.
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