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  2. Letter box - Wikipedia

    en.wikipedia.org/wiki/Letter_box

    Locking mailbox designs that provide security for the recipient's incoming mail have fewer restrictions on shape and size, though designs with a slot for incoming mail must be at least 1.75 inches high by 10 inches wide. [8] Residential locking mailboxes cannot require the postal carrier to have a key, by USPS Specifications. [9]

  3. Maildir - Wikipedia

    en.wikipedia.org/wiki/Maildir

    Maildir was designed by Daniel J. Bernstein circa 1995, with a major goal of eliminating the need for program code to handle file locking and unlocking through use of the local filesystem. [1] Maildir design reflects the fact that the only operations valid for an email message is that it be created, deleted or have its status changed in some way.

  4. Simple Mail Transfer Protocol - Wikipedia

    en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol

    In this example the email message is sent to two mailboxes on the same SMTP server: one for each recipient listed in the To: and Cc: header fields. The corresponding SMTP command is RCPT TO. Each successful reception and execution of a command is acknowledged by the server with a result code and response message (e.g., 250 Ok).

  5. Post box - Wikipedia

    en.wikipedia.org/wiki/Post_box

    Postbox of the Russian Post in Moscow. A post box (British English; also written postbox; also known as pillar box), also known as a collection box, mailbox, letter box or drop box (American English), is a physical box into which members of the public can deposit outgoing mail intended for collection by the agents of a country's postal service.

  6. Block and unblock email addresses in AOL Mail

    help.aol.com/articles/block-and-unblock-email...

    Block email addresses. 1. Open an email or select it from your mailbox. 2. Click the More icon. 2. Click Block Senders. 2. Optionally, select to also delete emails you've received from the sender.

  7. STD-4C - Wikipedia

    en.wikipedia.org/wiki/STD-4C

    The modular design of STD-4C mailbox systems makes it easier to create wall-mounted layouts. The 4C specification allows for both single and double column modules in varying heights so be sure to check with each manufacturer in order to include the most extensive line of options for your project. Outgoing mail slots are required in each 4C module.

  8. AOL Mail Help - AOL Help

    help.aol.com/products/new-aol-mail

    You've Got Mail!® Millions of people around the world use AOL Mail, and there are times you'll have questions about using it or want to learn more about its features. That's why AOL Mail Help is here with articles, FAQs, tutorials, our AOL virtual chat assistant and live agent support options to get your questions answered.

  9. 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!