blank.gif (43 bytes)

Church Of The
Swimming Elephant

Search:
5.2.19 Explicit Source Routes: RFC-822 Section 6.2.7 Connected: An Internet Encyclopedia
5.2.19 Explicit Source Routes: RFC-822 Section 6.2.7

Up: Connected: An Internet Encyclopedia
Up: Requests For Comments
Up: RFC 1123
Up: 5. ELECTRONIC MAIL -- SMTP and RFC-822
Up: 5.2 PROTOCOL WALK-THROUGH
Prev: 5.2.18 Common Address Formatting Errors: RFC-822 Section 6.1
Next: 5.3 SPECIFIC ISSUES

5.2.19 Explicit Source Routes: RFC-822 Section 6.2.7

5.2.19 Explicit Source Routes: RFC-822 Section 6.2.7

Internet host software SHOULD NOT create an RFC-822 header containing an address with an explicit source route, but MUST accept such headers for compatibility with earlier systems.

DISCUSSION:

In an understatement, RFC-822 says "The use of explicit source routing is discouraged". Many hosts implemented RFC-822 source routes incorrectly, so the syntax cannot be used unambiguously in practice. Many users feel the syntax is ugly. Explicit source routes are not needed in the mail envelope for delivery; see Section 5.2.6. For all these reasons, explicit source routes using the RFC- 822 notations are not to be used in Internet mail headers.

As stated in Section 5.2.16, it is necessary to allow an explicit source route to be buried in the local-part of an address, e.g., using the "%-hack", in order to allow mail to be gatewayed into another environment in which explicit source routing is necessary. The vigilant will observe that there is no way for a User Agent to detect and prevent the use of such implicit source routing when the destination is within the Internet. We can only discourage source routing of any kind within the Internet, as unnecessary and undesirable.


Next: 5.3 SPECIFIC ISSUES

Connected: An Internet Encyclopedia
5.2.19 Explicit Source Routes: RFC-822 Section 6.2.7

Cotse.Net

Protect yourself from cyberstalkers, identity thieves, and those who would snoop on you.
Stop spam from invading your inbox without losing the mail you want. We give you more control over your e-mail than any other service.
Block popups, ads, and malicious scripts while you surf the net through our anonymous proxies.
Participate in Usenet, host your web files, easily send anonymous messages, and more, much more.
All private, all encrypted, all secure, all in an easy to use service, and all for only $5.95 a month!

Service Details

 
.
www.cotse.com
Have you gone to church today?
.
All pages ©1999, 2000, 2001, 2002, 2003 Church of the Swimming Elephant unless otherwise stated
Church of the Swimming Elephant©1999, 2000, 2001, 2002, 2003 Cotse.com.
Cotse.com is a wholly owned subsidiary of Packetderm, LLC.

Packetderm, LLC
210 Park Ave #308
Worcester, MA 01609