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  2. Fix sending and receiving issues with third-party email apps

    help.aol.com/articles/cant-send-or-receive-email...

    If your third-party email app is having issues connecting, sending, or receiving emails, you may need to reconfigure your account or update the app. Use these steps to identify and fix the source of the problem. Troubleshoot any problems with your account

  3. List of SMTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SMTP_server_return...

    The Basic Status Codes have been in SMTP from the beginning, with RFC 821 in 1982, but were extended rather extensively, and haphazardly so that by 2003 RFC 3463 rather grumpily noted that: "SMTP suffers some scars from history, most notably the unfortunate damage to the reply code extension mechanism by uncontrolled use.

  4. Fix problems with third-party mail applications - AOL Help

    help.aol.com/articles/why-cant-i-access-my-aol...

    If you've activated 2-step verification for your AOL account, you'll need to generate and use an "app password" to access AOL Mail from these apps. Check your IMAP settings If your AOL Mail isn't sending or receiving mail properly, you'll need to make sure your IMAP or POP settings are correct .

  5. Use POP or IMAP to sync AOL Mail on a third-party app or ...

    help.aol.com/articles/how-do-i-use-other-email...

    Most email software and applications have an account settings menu where you'll need to update the IMAP or POP3 settings. When entering your account info, make sure you use your full email address, including @aol.com, and that the SSL encryption is enabled for incoming and outgoing mail.

  6. Simple Mail Transfer Protocol - Wikipedia

    en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol

    A session may include zero or more SMTP transactions. An SMTP transaction consists of three command/reply sequences: MAIL command, to establish the return address, also called return-path, [24] reverse-path, [25] bounce address, mfrom, or envelope sender. RCPT command, to establish a recipient of the message. This command can be issued multiple ...

  7. Callback verification - Wikipedia

    en.wikipedia.org/wiki/Callback_verification

    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").

  8. AOL Mail secure connection settings requirement - AOL Help

    help.aol.com/articles/secure-mail-connection-faq

    AOL is committed to protecting the privacy and security of our members. To maintain the security of your account while accessing AOL Mail through third-party apps, it's necessary to keep your connection settings updated.

  9. SMTP Authentication - Wikipedia

    en.wikipedia.org/wiki/SMTP_Authentication

    SMTP Authentication, often abbreviated SMTP AUTH, is an extension of the Simple Mail Transfer Protocol (SMTP) whereby a client may log in using any authentication mechanism supported by the server. It is mainly used by submission servers, where authentication is mandatory.