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  2. List of SMTP server return codes - Wikipedia

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

    A "Basic Status Code" SMTP reply consists of a three digit number (transmitted as three numeric characters) followed by some text. The number is for use by automata (e.g., email clients) to determine what state to enter next; the text ("Text Part") is for the human user. The first digit denotes whether the response is good, bad, or incomplete:

  3. Email spoofing - Wikipedia

    en.wikipedia.org/wiki/Email_spoofing

    Email spoofing is the creation of email messages with a forged sender address. [1] The term applies to email purporting to be from an address which is not actually the sender's; mail sent in reply to that address may bounce or be delivered to an unrelated party whose identity has been faked. Disposable email address or "masked" email is a ...

  4. Simple Mail Transfer Protocol - Wikipedia

    en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol

    The Simple Mail Transfer Protocol ( SMTP) is an Internet standard communication protocol for electronic mail transmission. Mail servers and other message transfer agents use SMTP to send and receive mail messages. User-level email clients typically use SMTP only for sending messages to a mail server for relaying, and typically submit outgoing ...

  5. Compose and send emails in AOL Mail - AOL Help

    help.aol.com/articles/aol-mail-compose-and-contacts

    2. In the "To" field, type the name or email address of your contact. 3. In the "Subject" field, type a brief summary of the email. 4. Type your message in the body of the email. 5. Click Send. Want to write your message using the full screen? Click the Expand email icon at the top of the message.

  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. Overview of AOL Mail - AOL Help

    help.aol.com/articles/overview-of-new-aol-mail

    From customizing the notification sound you'll get when you receive a new email to eliminating unwanted emails by enabling the option to only receive messages from senders who are in your contact list, AOL Mail has all your favorite classic Mail features. New/Old Mail - Separate your messages in different folders or keep it all in one place ...

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Challenge–response spam filtering - Wikipedia

    en.wikipedia.org/wiki/Challenge–response_spam...

    Challenge–response spam filtering. A challenge–response (or C/R) system is a type of that automatically sends a reply with a challenge to the (alleged) sender of an incoming e-mail. It was originally designed in 1997 by Stan Weatherby, and was called Email Verification. In this reply, the purported sender is asked to perform some action to ...