Topic Last Modified: 2009-04-29

This topic is intended to be a reference for the Request for Comments (RFC) and other standards that are supported in Microsoft Exchange Server 2007. While every effort has been made to verify this information, omission of an RFC from this list does not necessarily mean that Exchange does not at least partially support the RFC. RFCs are guidelines, but often contain two types of information: required and optional. Microsoft and other vendors may or may not choose to implement optional requirements or may interpret portions of RFCs differently.

If you have an issue where you feel that Exchange is not properly supporting a particular RFC, and this is causing a problem, open a support incident with Microsoft Product Support Services.

Important:
The information contained in this topic represents the current view of Microsoft Corporation on the issues discussed as of the date of publication. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information that is presented in this topic after the date of publication.

This topic is for informational purposes only. MICROSOFT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, AS TO THE INFORMATION IN THIS DOCUMENT.

RFC Implementation Statements

All document references are listed in the following format:

Document/RFC: Document or RFC index.

Title: Description or title of document.

Updated by: RFCs that update this document.

Updates: RFCs updated by this document.

Obsoletes: RFCs replaced by this document or obsolete.

Exchange 2007 specific: Implemented or supported by Exchange 2007; if applicable, the component and any other notes about support for the applicable RFC; links to additional information.

Note:
For the purposes of this topic, "implemented" means that the RFC has been implemented natively within Exchange 2007, and "supported" means that a technology outside of Exchange 2007 has implemented the RFC but that Exchange 2007 uses that implementation.

Not all document references contain all fields that are shown in the sample format. In some cases, the information has been consolidated. Refer to the document source for the latest information.

World Wide Web Consortium (W3C) Standards

Note:
The third-party Web site information in this topic is provided to help you find the technical information you need. The URLs are subject to change without notice. 

Document: http://www.w3.org/TR/REC-html32

Title: HTML 3.2 Reference Specification

Exchange 2007 specific: Implemented by Exchange 2007 Text Conversion component.

Document: http://www.w3.org/TR/REC-html40

Title: HTML 4.01 Reference Specification

Exchange 2007 specific: Implemented by Exchange 2007 Text Conversion component.

Document: http://www.w3.org/TR/REC-xml/

Title: Extensible Markup Language (XML) 1.0 (Fourth Edition)

Exchange 2007 specific: Implemented by Exchange Web Services and Exchange WebDAV ISAPI Extension for IIS.

Document: http://www.w3.org/TR/2000/NOTE-SOAP-20000508/

Title: Simple Object Access Protocol (SOAP) 1.1

Exchange 2007 specific: Partially implemented by Exchange Web Services.

Document: Web Services-Interoperability Organization (WS-I) Standards

Title: WS-I Basic Profile 1.0

Exchange 2007 specific: Implemented by Exchange 2007 Web Services.

RFC: 1035 http://www.ietf.org/rfc/rfc1035.txt

Title: Domain Names - Implementation and Specification

Updated by: 1101, 1183, 1348, 1876, 1982, 1995, 1996, 2065, 2136, 2137, 2181, 2308, 2535, 2845, 3425, 3658, 4033, 4034, 4035, 4343

Obsoletes: 882, 883, 973

Exchange 2007 specific: Supported by Exchange 2007.

RFC: 1652 http://www.ietf.org/rfc/rfc1652.txt

Title: SMTP Service Extension for 8bit-MIME transport

Obsoletes: 1426

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components.

RFC: 1731 http://www.ietf.org/rfc/rfc1731.txt

Title: IMAP4 Authentication Mechanisms

Exchange 2007 specific : Implemented by Exchange 2007 IMAP4 Service.

RFC: 1740 http://www.ietf.org/rfc/rfc1740.txt

Title: Mime Encapsulation of Macintosh files - MacMIME

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components.

RFC: 1741 http://www.ietf.org/rfc/rfc1741.txt

Title: MIME Content Type for BinHex Encoded Files

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components.

RFC: 1823 http://www.ietf.org/rfc/rfc1823.txt

Title: The LDAP Application Program Interface

Exchange 2007 specific: Supported by Exchange 2007 to communicate with Active Directory.

RFC: 1870 http://www.ietf.org/rfc/rfc1870.txt

Title: SMTP Service Extension for Message Size Declaration

Obsoletes: 1653

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

RFC: 1896 http://www.ietf.org/rfc/rfc1896.txt

Title: The text/enriched MIME Content-type

Obsoletes: 1523, 1563

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components.

RFC: 1939 http://www.ietf.org/rfc/rfc1939.txt

Title: Post Office Protocol - Version 3

Updated by: 1957, 2449

Obsoletes: 1725

Exchange 2007 specific: Implemented by Exchange 2007 POP3 Service.

RFC: 2034 http://www.ietf.org/rfc/rfc2034.txt

Title: SMTP Service Extension for Returning Enhanced Error Codes

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

RFCs: 2045, 2046, 2047, 2049, 4288, 4289

http://www.ietf.org/rfc/rfc2045.txt

http://www.ietf.org/rfc/rfc2046.txt

http://www.ietf.org/rfc/rfc2047.txt

http://www.ietf.org/rfc/rfc 2049 .txt

http://www.ietf.org/rfc/rfc 4288 .txt

http://www.ietf.org/rfc/rfc 4289 .txt

Title: Multipurpose Internet Mail Extensions (MIME)

Updated by: 2184, 2231, 2646, 3798

Obsoletes: 1521, 1522, 1590, 2048

Exchange 2007 specific: Implemented by Exchange 2007.

RFC: 2088 http://www.ietf.org/rfc/rfc2088.txt

Title: IMAP4 non-synchronizing literals

Updated by: 4466

Exchange 2007 specific: Implemented by Exchange 2007 IMAP4 Service.

RFC: 2177 http://www.ietf.org/rfc/rfc2177.txt

Title: IMAP4 IDLE command

Exchange 2007 specific: Implemented by Exchange 2007 IMAP4 Service.

RFC: 2181 http://www.ietf.org/rfc/rfc2181.txt

Title: Clarifications to the DNS Specification

Updated by: 2535, 4033, 4034, 4035, 4343

Updates: 1034, 1035, 1123

Exchange 2007 specific: Supported by Exchange 2007.

RFC: 2183 http://www.ietf.org/rfc/rfc2183.txt

Title: Communicating Presentation Information in Internet Messages: The Content-Disposition Header Field

Updated by: 2184, 2231

Updates: 1806

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components.

RFC: 2231 http://www.ietf.org/rfc/rfc2231.txt

Title: MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and Continuations

Updates: 2045, 2047, 2183

Obsoletes: 2184

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components. Note that while RFC2231-encoded attachment filenames are supported during inbound conversion, Exchange 2007 will not generate RFC2231-encoded content in MIME e-mail messages.

RFC: 2247 http://www.ietf.org/rfc/rfc2247.txt

Title: Using Domains in LDAP/X.500 Distinguished Names

Updated by: 4519, 4524

Exchange 2007 specific: Supported by Exchange 2007.

RFC: 2311 http://www.ietf.org/rfc/rfc2311.txt

Title: S/MIME Version 2 Message Specification

Exchange 2007 specific: Implemented by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 2312 http://www.ietf.org/rfc/rfc2312.txt

Title: S/MIME Version 2 Certificate Handling

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 2342 http://www.ietf.org/rfc/rfc2342.txt

Title: IMAP4 Namespace

Updated by: 4466

Exchange 2007 specific: Implemented by Exchange 2007 IMAP4 Service.

RFC: 2387 http://www.ietf.org/rfc/rfc2387.txt

Title: The MIME Multipart/Related Content-type

Updated by: 2112

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components.

RFC: 2426 http://www.ietf.org/rfc/rfc2426.txt

Title: vCard MIME Directory Profile

Exchange 2007 specific: Implemented by Exchange 2007 CDOEX component. Supports vCard import/export.

RFC: 2445 http://www.ietf.org/rfc/rfc2445.txt

Title: Internet Calendaring and Scheduling Core Object Specification (iCalendar)

Exchange 2007 specific: Implemented by Exchange 2007.

RFC: 2446 http://www.ietf.org/rfc/rfc2446.txt

Title: iCalendar Transport-Independent Interoperability Protocol (iTIP) Scheduling Events, BusyTime, To-dos and Journal Entries

Exchange 2007 specific: Implemented by Exchange 2007 (partially supported).

RFC: 2447 http://www.ietf.org/rfc/rfc2447.txt

Title: iCalendar Message-Based Interoperability Protocol (iMIP)

Exchange 2007 specific: Implemented by Exchange 2007 (partially supported).

RFC: 2449 http://www.ietf.org/rfc/rfc2449.txt

Title: POP3 Extension Mechanism

Updated by: 5034

Updates: 1939

Exchange 2007 specific: Implemented by Exchange 2007 POP3 Service.

RFC: 2557 http://www.ietf.org/rfc/rfc2557.txt

Title: MIME Encapsulation of Aggregate Documents, such as HTML (MHTML)

Obsoletes: 2110

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components.

RFC: 2595 http://www.ietf.org/rfc/rfc2595.txt

Title: Using TLS with IMAP, POP3 and ACAP

Updated by: 4616

Exchange 2007 specific: Implemented by Exchange 2007 IMAP4 and POP3 services. ACAP not supported.

RFC: 2616 http://www.ietf.org/rfc/rfc2616.txt

Title: Hypertext Transfer Protocol - HTTP v1.1

Updated by: 2817

Obsoletes: 2068

Exchange 2007 specific: Implemented by Windows Server 2003 and 2008. Supported by Exchange 2007 Autodiscover Service, Exchange Web Services, and Exchange WebDAV ISAPI Extension for IIS.

RFC: 2617 http://www.ietf.org/rfc/rfc2617.txt

Title: HTTP Authentication: Basic and Digest Access Authentication

Obsoletes: 2069

Exchange 2007 specific: Supported by Exchange 2007 Autodiscover Service, Exchange Web Services, and Exchange WebDAV ISAPI Extension for IIS.

RFC: 2631 http://www.ietf.org/rfc/rfc2631.txt

Title: Diffie-Hellman Key Agreement Method

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access S/MIME Control.

RFC: 2634 http://www.ietf.org/rfc/rfc2634.txt

Title: Enhanced Security Services for S/MIME

Exchange 2007 specific: Partially supported by Exchange 2007.

RFC: 2782 http://www.ietf.org/rfc/rfc2782.txt

Title: A DNS RR for specifying the location of services (DNS SRV)

Obsoletes: 2052

Exchange 2007 specific: Supported by Exchange 2007.

RFC: 2797 http://www.ietf.org/rfc/rfc2797.txt

Title: Certificate Management Messages over CMS

Exchange 2007 specific: Implemented by Exchange 2007 Outlook Web Access S/MIME Control.

RFC: 2821 http://www.ietf.org/rfc/rfc2821.txt

Title: Simple Mail Transfer Protocol (SMTP)

Updates: 1123

Obsoletes: 821, 974, 1869

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

RFC: 2822 http://www.ietf.org/rfc/rfc2822.txt

Title: Internet Message Format

Obsoletes: 822

Exchange 2007 specific: Implemented by Exchange 2007 MIME Conversion Shared Components.

RFC: 3030 http://www.ietf.org/rfc/rfc3030.txt

Obsoletes: 1830

Title: SMTP Service Extensions for Transmission of Large and Binary MIME Messages

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

RFC: 3207 http://www.ietf.org/rfc/rfc3207.txt

Title: SMTP Service Extension for Secure SMTP over Transport Layer Security

Obsoletes: 2487

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

RFC: 3217 http://www.ietf.org/rfc/rfc3217.txt

Title: Triple-DES and RC2 Key Wrapping

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

RFC: 3278 http://www.ietf.org/rfc/rfc3278.txt

Title: Use of Elliptic Curve Cryptography (ECC) Algorithms in Cryptographic Message Syntax (CMS)

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 3370 http://www.ietf.org/rfc/rfc3370.txt

Title: Cryptographic Message Syntax (CMS) Algorithms

Obsoletes: 2630, 3211

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 3394 http://www.ietf.org/rfc/rfc3394.txt

Title: Advanced Encryption Standard (AES) Key Wrap Algorithm

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 3461 http://www.ietf.org/rfc/rfc3461.txt

Title: Simple Mail Transfer Protocol (SMTP) Service Extension for Delivery Status Notifications (DSNs)

Obsoletes: 1891

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

For more information, see Understanding Non-Delivery Reports.

RFC: 3462 http://www.ietf.org/rfc/rfc3462.txt

Title: The Multipart/Report Content Type for the Reporting of Mail System Administrative MessagesObsoletes: 1892

Exchange 2007 specific: Partially implemented by Exchange 2007 Transport service.

RFC: 3463 http://www.ietf.org/rfc/rfc3463.txt

Title: Enhanced Mail System Status Codes

Updated by: 3886, 4468, 4865, 4954

Obsoletes: 1893

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

For more information, see Understanding Non-Delivery Reports.

RFC: 3464 http://www.ietf.org/rfc/rfc3464.txt

Title: An Extensible Message Format for Delivery Status Notifications

Updated by: 4865

Obsoletes: 1894

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

RFC: 3501 http://www.ietf.org/rfc/rfc3501.txt

Title: Internet Message Access Protocol - Version 4rev1

Updated by: 4466, 4469, 4551, 5032, 5182

Obsoletes: 2060

Exchange 2007 specific: Implemented by Exchange 2007. (AUTH=PLAIN not supported.)

RFC: 3503 http://www.ietf.org/rfc/rfc3503.txt

Title: Message Disposition Notification (MDN) profile for Internet Message Access Protocol (IMAP).

Exchange 2007 specific: Implemented by Exchange 2007 and adheres to the server implementation section.

RFC: 3565 http://www.ietf.org/rfc/rfc3565.txt

Title: Use of the Advanced Encryption Standard (AES) Encryption Algorithm in Cryptographic Message Syntax (CMS)

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 3629 http://www.ietf.org/rfc/rfc3629.txt

Title: UTF-8, a transformation format of ISO 10646

Updates: 2279

Exchange 2007 specific: Supported by Exchange 2007

RFC: 3834 http://www.ietf.org/rfc/rfc3834.txt

Title: Recommendations for Automatic Responses to Electronic Mail

Exchange 2007 specific: Implemented by Exchange 2007 Mailbox Server.

RFC: 3842 http://www.ietf.org/rfc/rfc3842.txt

Title: A Message Summary and Message Waiting Indication Event Package for the Session Initiation Protocol (SIP)

Exchange 2007 specific: Implemented by Exchange 2007 Unified Messaging.

RFC: 3850 http://www.ietf.org/rfc/rfc3850.txt

Title: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Certificate Handling

Obsoletes: 2632

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 3851 http://www.ietf.org/rfc/rfc3851.txt

Title: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message Specification

Obsoletes: 2633

Exchange 2007 specific: Implemented by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 3852 http://www.ietf.org/rfc/rfc3852.txt

Title: Cryptographic Message Syntax (CMS)

Updated by: 4853, 5083

Obsoletes: 3369

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 3974 http://www.ietf.org/rfc/rfc3974.txt

Title: SMTP Operational Experience in Mixed IPv4/v6 Environments

Exchange 2007 specific: Supported by Exchange 2007 Transport service.

RFC: 4120 http://www.ietf.org/rfc/rfc4120.txt

Title: The Kerberos Network Authentication Service (V5)

Updated by: 4537, 5021

Obsoletes: 1510

Exchange 2007 specific: Supported by Exchange 2007 Mailbox Server with the MSRPC protocol, as well and the Exchange POP3, IMAP4 and SMTP services.

RFC: 4262 http://www.ietf.org/rfc/rfc4262.txt

Title: X.509 Certificate Extension for Secure/Multipurpose Internet Mail Extensions (S/MIME) Capabilities

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 4346 http://www.ietf.org/rfc/rfc4346.txt

Title: The Transport Layer Security (TLS) Protocol Version 1.1

Updated by: 4366, 4680, 4681

Obsoletes: 2246

Exchange 2007 specific: Implemented by Exchange 2007 Transport service, POP3 service, and IMAP4 service.

RFC: 4406 http://www.ietf.org/rfc/rfc4406.txt

Title: Sender ID: Authenticating E-Mail

Exchange 2007 specific: Partially implemented. Exchange 2007 does not support MTA forwarding of mail.

RFC: 4409 http://www.ietf.org/rfc/rfc4409.txt

Title: Message Submission for Mail

Obsoletes: 2476

Exchange 2007 specific: Partially implemented. Exchange 2007 does not always return 554 DSN (for example, 550 5.7.1).

RFC: 4559 http://www.ietf.org/rfc/rfc4559.txt

Title: SPNEGO-based Kerberos and NTLM HTTP Authentication in Microsoft Windows

Exchange 2007 specific: Supported by Exchange 2007 Autodiscover Service, Exchange Web Services, and Exchange WebDAV ISAPI Extension for IIS.

RFC: 4853 http://www.ietf.org/rfc/rfc4853.txt

Title: Cryptographic Message Syntax (CMS) Multiple Signer Clarification

Updates: 3852

Exchange 2007 specific: Implemented by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 4918 http://www.ietf.org/rfc/rfc4918.txt

Title: HTTP Extensions for Web Distributed Authoring and Versioning- (WebDAV)

Obsoletes: 2518

Exchange 2007 specific: Implemented by Exchange 2007 WebDAV ISAPI Extension for IIS

RFC: 4954 http://www.ietf.org/rfc/rfc4954.txt

Title: SMTP Service Extension for Authentication

Updates: 3463

Obsoletes: 2554

Exchange 2007 specific: Implemented by Exchange 2007 Transport Service.

RFC: 5008 http://www.ietf.org/rfc/rfc5008.txt

Title: Suite B in Secure/Multipurpose Internet Mail Extensions (S/MIME)

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

RFC: 1734 http://www.ietf.org/rfc/rfc1734.txt

Title: POP3 SASL Authentication Mechanism

Exchange 2007 specific: Implemented by Exchange 2007 POP3 service (Windows Integrated Authentication - NTLM and GSSAPI).

RFC: 5035 http://www.ietf.org/rfc/rfc5035.txt

Title: Enhanced Security Services (ESS) Update: Adding CertID Algorithm Agility

Updates: 2634

Exchange 2007 specific: Supported by Exchange 2007 Outlook Web Access and S/MIME control.

For More Information

For more information about Exchange Server RFC and standards compliance in earlier versions of Exchange, see Microsoft Knowledge Base article 262986, Exchange Server RFC and standards compliance.

For more information about RFCs, visit the following non-Microsoft Web sites:

Note:
The third-party Web site information in this topic is provided to help you find the technical information you need. The URLs are subject to change without notice.