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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.

  3. 2021 Facebook outage - Wikipedia

    en.wikipedia.org/wiki/2021_Facebook_outage

    CNBC reported that the outage was the worst experienced by Facebook since 2008. [21] During the day of the outage, shares in the company dropped by nearly 5% and Facebook CEO Mark Zuckerberg's wealth fell by more than $6 billion. [21] [22] [23] According to a report produced by Fortune and Snopes, Facebook lost at least $60 million in ...

  4. Facebook outage caused by error during maintenance work ... - AOL

    www.aol.com/facebook-outage-caused-error-during...

    The social network went offline for more than five hours on Monday.

  5. Facebook outage: Why the world’s largest social ... - AOL

    www.aol.com/finance/facebook-outage-why-world...

    The collapse was so widespread that Facebook employees couldn’t communicate with each other using the company’s internal chat app, while others were unable to open doors on the Facebook campus.

  6. About error message 'We can't sign you in right now. Please ...

    help.aol.com/articles/error-message-we-cant-sign...

    © 2025 Yahoo. All rights reserved.

  7. Greylisting (email) - Wikipedia

    en.wikipedia.org/wiki/Greylisting_(email)

    Greylisting is a method of defending e-mail users against spam.A mail transfer agent (MTA) using greylisting will "temporarily reject" any email from a sender it does not recognize.

  8. List of SMTP server return codes - Wikipedia

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

    The meaning of the "detail" field depends on the class and the subject, and are listed in RFC 3463 and RFC 5248. A server capable of replying with an Enhanced Status Code MUST preface (prepend) the Text Part of SMTP Server responses with the Enhanced Status Code followed by one or more spaces.

  9. Fix problems reading or receiving AOL Mail

    help.aol.com/articles/fix-problems-reading-or...

    If your firewall software isn't on the list linked, you will need to contact your firewall software provider for additional info. Disable Protected Mode in Internet Explorer. Protected mode is enable by default and may interfere with AOL Mail. If you're continuing to have trouble accessing mail, turn Protected Mode off: 1. Click Tools. 2.