Email Protocols

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  • POP3 (Post Office Protocol 3)

    POP3 (Post Office Protocol 3) is the most recent version of a standard protocol for receiving e-mail. 

  • Automatic Private IP Addressing (APIPA)

    Automatic Private IP Addressing (APIPA) is a feature of Windows-based operating systems (included in Windows 98, ME, 2000, and XP) that enables a computer to automatically assign itself an IP address when there is no Dynamic Host Configuration Protoc... 

  • IMAP (Internet Message Access Protocol)

    IMAP (Internet Message Access Protocol) is a standard protocol for accessing e-mail from your local server. 

  • MAPI (Messaging Application Program Interface)

    MAPI (Messaging Application Program Interface) is a Microsoft Windows program interface that enables you to send e-mail from within a Windows application and attach the document you are working on to the e-mail note. 

  • SMTP (Simple Mail Transfer Protocol)

    SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in sending and receiving e-mail. 

  • X.400

    X.400 is the messaging (notably e-mail) standard specified by the ITU-TS (International Telecommunications Union - Telecommunication Standard Sector). 

About Email Protocols

Email protocols provide the "plumbing" that allows Microsoft Exchange Server to send and receive email and communicate with other servers. Whether you want set up a POP3 connector to download email from ISP accounts to Microsoft Outlook clients, understand LDAP queries between Active Directory and Exchange Server, or troubleshoot HTTP and SMTP communication problems, these tips and tutorials will teach you what you need to know about Exchange-related email protocols.