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  2. Google services outages - Wikipedia

    en.wikipedia.org/wiki/Google_services_outages

    The first was a five-minute outage of every Google service in August 2013. The second was a 25-minute outage of Gmail, Google+, Google Calendar, and Google Docs in January 2014. The third was a YouTube outage in October 2018. The fourth was a Gmail/Google Drive outage in August 2020. The fifth, in November 2020, affected mainly YouTube, and the ...

  3. Frequency of exceedance - Wikipedia

    en.wikipedia.org/wiki/Frequency_of_exceedance

    Thus, the mean time between peaks, including the residence time or mean time before the very first peak, is the inverse of the frequency of exceedance N −1 (y max). If the number of peaks exceeding y max grows as a Poisson process, then the probability that at time t there has not yet been any peak exceeding y max is e − N ( y max ) t . [ 6 ]

  4. Gmail - Wikipedia

    en.wikipedia.org/wiki/Gmail

    Gmail is the email service provided by Google.As of 2019, it had 1.5 billion active users worldwide, making it the largest email service in the world. [1] It also provides a webmail interface, accessible through a web browser, and is also accessible through the official mobile application.

  5. Google Account - Wikipedia

    en.wikipedia.org/wiki/Google_Account

    Google also offers a two-step verification option—for additional security against hacking—that requests a validation code each time the user logs into their Google account. The code is either generated by an application (" Google Authenticator " or other similar apps) or received from Google as an SMS text message, a voice message, or an ...

  6. Why did I receive an email from MAILER-DAEMON? - AOL Help

    help.aol.com/articles/what-is-a-mailer-daemon...

    When you get a message from a "MAILER-DAEMON" or a "Mail Delivery Subsystem" with a subject similar to "Failed Delivery," this means that an email you sent was undeliverable and has been bounced back to you.

  7. List of SMTP server return codes - Wikipedia

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

    In general the class identifier MUST match the first digit of the Basic Status Code to which it applies. [1] The subjects are defined as follows: X.0.XXX Other or Undefined Status; X.1.XXX Addressing Status; X.2.XXX Mailbox Status; X.3.XXX Mail System Status; X.4.XXX Network and Routing Status; X.5.XXX Mail Delivery Protocol Status

  8. Gmail interface - Wikipedia

    en.wikipedia.org/wiki/Gmail_interface

    Gmail allows users to conduct advanced searches using either the Advanced Search interface or through search operators in the search box. Emails can be searched by their text; by their ‘From’, ‘To’ and ‘Subject’ fields, by their location, date and size; by associated labels, categories and circles, by whether or not the message is read, and by whether or not the message has an ...

  9. Email digest - Wikipedia

    en.wikipedia.org/wiki/Email_digest

    An email digest is an email that is automatically generated by an electronic mailing list and which combines all exchanged emails during a time period (e.g. day, week, month, etc.) or when a volume limit is reached (e.g. every 10 or 100 messages) into one single message.