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2. Callback verification - Wikipedia

   en.wikipedia.org/wiki/Callback_verification

   This problem can be alleviated by testing a random non-existent address as well as the desired address (if the test succeeds, further verification is useless). Servers that implement catch-all e-mail will, by definition, consider all e-mail addresses to be valid and accept them. Like systems that accept-then-bounce, a random non-existent ...

3. Identify legitimate AOL websites, requests, and communications

   help.aol.com/articles/identify-legitimate-aol...

   • Fake email addresses - Malicious actors sometimes send from email addresses made to look like an official email address but in fact is missing a letter(s), misspelled, replaces a letter with a lookalike number (e.g. “O” and “0”), or originates from free email services that would not be used for official communications.

4. Use AOL Certified Mail to confirm legitimate AOL emails

   help.aol.com/articles/what-is-aol-certified-mail

   When you open the email, you'll also see the Certified Mail banner above the message details. When you get a message that seems to be from AOL, but it doesn't have those 2 indicators, and it isn't alternatively marked as AOL Official Mail, it might be a fake email. Make sure you mark it as spam and don't click on any links in the email.

5. Use AOL Official Mail to confirm legitimate AOL emails

   help.aol.com/articles/what-is-official-aol-mail

   If you get a message that seems like it's from AOL, but it doesn't have those 2 indicators, and it isn't alternatively marked as AOL Certified Mail, it might be a fake email. Make sure you immediately mark it as spam and don't click on any links in the email.

6. Test validity - Wikipedia

   en.wikipedia.org/wiki/Test_validity

   Test validity is the extent to which a test (such as a chemical, physical, or scholastic test) accurately measures what it is supposed to measure.In the fields of psychological testing and educational testing, "validity refers to the degree to which evidence and theory support the interpretations of test scores entailed by proposed uses of tests". [1]

7. Authenticated Received Chain - Wikipedia

   en.wikipedia.org/wiki/Authenticated_Received_Chain

   However, a strict DMARC policy may block legitimate emails sent through a mailing list or forwarder, as the DKIM signature will be invalidated if the message is modified, such as by adding a subject tag or footer, and the SPF check will either fail (if the forwarder didn't change the bounce address) or be aligned with the mailing list domain ...