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

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

    Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more. What does it mean if I have emails from "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 ...

  3. Comparison of webmail providers - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_webmail...

    The following tables compare general and technical information for a number of notable webmail providers who offer a web interface in English.. The list does not include web hosting providers who may offer email server and/or client software as a part of hosting package, or telecommunication providers (mobile network operators, internet service providers) who may offer mailboxes exclusively to ...

  4. Starfield Technologies - Wikipedia

    en.wikipedia.org/wiki/Starfield_Technologies

    Starfield Technologies is a company founded as a spin-off from GoDaddy in 2003, [1] the American internet domain registrar and web hosting company that also sells e-business related software and services. Starfield handles research and design for GoDaddy's web based services, developing technologies and tools to support the company and their ...

  5. Server Name Indication - Wikipedia

    en.wikipedia.org/wiki/Server_Name_Indication

    SNI addresses this issue by having the client send the name of the virtual domain as part of the TLS negotiation's ClientHello message. [3] This enables the server to select the correct virtual domain early and present the browser with the certificate containing the correct name.

  6. Facebook - Wikipedia

    en.wikipedia.org/wiki/Facebook

    For example, a Facebook user can link their email account to their Facebook to find friends on the site, allowing the company to collect the email addresses of users and non-users alike. [411] Over time, countless data points about an individual are collected; any single data point perhaps cannot identify an individual, but together allows the ...

  7. 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.

  8. DNS-based Authentication of Named Entities - Wikipedia

    en.wikipedia.org/wiki/DNS-based_Authentication...

    DNS-based Authentication of Named Entities (DANE) is an Internet security protocol to allow X.509 digital certificates, commonly used for Transport Layer Security (TLS), to be bound to domain names using Domain Name System Security Extensions ().

  9. Domain Name System - Wikipedia

    en.wikipedia.org/wiki/Domain_Name_System

    For instance, mail transfer agents use DNS to find the best mail server to deliver e-mail: An MX record provides a mapping between a domain and a mail exchanger; this can provide an additional layer of fault tolerance and load distribution. The DNS is used for efficient storage and distribution of IP addresses of blacklisted email hosts.