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[DOMAINKEYS]            Delany, M., "Domain-Based Email Authentication
                        Using Public Keys Advertised in the DNS
                        (DomainKeys)", RFC 4870, May 2007.

[DOMAINKEYS]            Delany, M., "Domain-Based Email Authentication
                        Using Public Keys Advertised in the DNS
                        (DomainKeys)", RFC 4870, May 2007.

[DSN]                   Moore, K. and G. Vaudreuil, "An Extensible
                        Message Format for Delivery Status
                        Notifications", RFC 3464, January 2003.

[DSN]                   Moore, K. and G. Vaudreuil, "An Extensible
                        Message Format for Delivery Status
                        Notifications", RFC 3464, January 2003.

[EMAIL-ARCH]            Crocker, D., "Internet Mail Architecture",
                        Work in Progress, October 2008.

[EMAIL-ARCH]            Crocker, D., "Internet Mail Architecture",
                        Work in Progress, October 2008.

[IANA-CONSIDERATIONS]   Narten, T. and H. Alvestrand, "Guidelines for
                        Writing an IANA Considerations Section in
                        RFCs", BCP 26, RFC 5226, May 2008.

[IANA-CONSIDERATIONS]   Narten, T. and H. Alvestrand, "Guidelines for
                        Writing an IANA Considerations Section in
                        RFCs", BCP 26, RFC 5226, May 2008.

[IMAP]                  Crispin, M., "INTERNET MESSAGE ACCESS PROTOCOL
                        - VERSION 4rev1", RFC 3501, March 2003.

[IMAP]                  Crispin, M., "INTERNET MESSAGE ACCESS PROTOCOL
                        - VERSION 4rev1", RFC 3501, March 2003.

[POP3]                  Myers, J. and M. Rose, "Post Office Protocol -
                        Version 3", STD 53, RFC 1939, May 1996.

[POP3]                  Myers, J. and M. Rose, "Post Office Protocol -
                        Version 3", STD 53, RFC 1939, May 1996.

[SECURITY]              Rescorla, E. and B. Korver, "Guidelines for
                        Writing RFC Text on Security Considerations",
                        BCP 72, RFC 3552, July 2003.

[SECURITY]              Rescorla, E. and B. Korver, "Guidelines for
                        Writing RFC Text on Security Considerations",
                        BCP 72, RFC 3552, July 2003.

[SENDERID]              Lyon, J. and M. Wong, "Sender ID:
                        Authenticating E-Mail", RFC 4406, April 2006.

[SENDERID]              Lyon, J. and M. Wong, "Sender ID:
                        Authenticating E-Mail", RFC 4406, April 2006.

[SMTP]                  Klensin, J., "Simple Mail Transfer Protocol",
                        RFC 5321, October 2008.

[SMTP]                  Klensin, J., "Simple Mail Transfer Protocol",
                        RFC 5321, October 2008.

[SPF]                   Wong, M. and W. Schlitt, "Sender Policy
                        Framework (SPF) for Authorizing Use of Domains
                        in E-Mail, Version 1", RFC 4408, April 2006.

[SPF]                   Wong, M. and W. Schlitt, "Sender Policy
                        Framework (SPF) for Authorizing Use of Domains
                        in E-Mail, Version 1", RFC 4408, April 2006.

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