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  2. List of HTTP status codes - Wikipedia

    https://en.wikipedia.org/wiki/List_of_HTTP_status_codes

    An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.

  3. Transport Layer Security - Wikipedia

    https://en.wikipedia.org/wiki/Transport_Layer_Security

    The connection is reliable (or has integrity) because each message transmitted includes a message integrity check using a message authentication code to prevent undetected loss or alteration of the data during transmission. TLS supports many different methods for exchanging keys, encrypting data, and authenticating message integrity.

  4. Fix problems sending AOL Mail

    https://help.aol.com/articles/aol-mail-troubleshooting

    1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more. Fix problems sending AOL Mail. If you're having problems sending messages in AOL Mail, it could be for one of several reasons. Most sending issues can be fixed with a couple of quick troubleshooting steps.

  5. Server Name Indication - Wikipedia

    https://en.wikipedia.org/wiki/Server_Name_Indication

    Server Name Indication (SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. [1] The extension allows a server to present one of multiple possible certificates on the same IP address and TCP port ...

  6. AOL Mail secure connection settings requirement

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

    An email was sent to our customers in 2017 warning that AOL Mail would no longer be accessible through third-party apps if connection settings weren't updated by November 7, 2017. If you still haven't done so, update your connection settings now. Verizon.net customers: Learn how to update connection settings for your accounts.

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

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

    Troubleshoot any problems with your account. 1. Sign into AOL Mail on a web browser. 2. Compose an email and add your own email address in the "To" field. 3. Send the email and check if it arrives. Reconfigure your account in the app. Remove and re-add your account to the third-party app.

  8. HTTP Strict Transport Security - Wikipedia

    https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security

    A server implements an HSTS policy by supplying a header over an HTTPS connection (HSTS headers over HTTP are ignored). [1] For example, a server could send a header such that future requests to the domain for the next year (max-age is specified in seconds; 31,536,000 is equal to one non-leap year) use only HTTPS: Strict-Transport-Security: max-age=31536000.

  9. AOL Mail

    https://mail.aol.com

    You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.