RFC Errata
RFC 5321, "Simple Mail Transfer Protocol", October 2008
Note: This RFC has been updated by RFC 7504
Source of RFC: IETF - NON WORKING GROUPArea Assignment: art
Errata ID: 2467
Status: Rejected
Type: Editorial
Publication Format(s) : TEXT
Reported By: Michael Rushton
Date Reported: 2010-08-16
Rejected by: Pete Resnick
Date Rejected: 2011-06-11
Section 4.1.3 says:
IPv6-comp = [IPv6-hex *5(":" IPv6-hex)] "::"
[IPv6-hex *5(":" IPv6-hex)]
; The "::" represents at least 2 16-bit groups of
; zeros. No more than 6 groups in addition to the
; "::" may be present.
IPv6v4-full = IPv6-hex 5(":" IPv6-hex) ":" IPv4-address-literal
IPv6v4-comp = [IPv6-hex *3(":" IPv6-hex)] "::"
[IPv6-hex *3(":" IPv6-hex) ":"]
IPv4-address-literal
; The "::" represents at least 2 16-bit groups of
; zeros. No more than 4 groups in addition to the
; "::" and IPv4-address-literal may be present.
It should say:
IPv6-comp = [IPv6-hex *6(":" IPv6-hex)] "::"
[IPv6-hex *6(":" IPv6-hex)]
; The "::" represents at least 1 16-bit groups of
; zeros. No more than 7 groups in addition to the
; "::" may be present.
IPv6v4-full = IPv6-hex 5(":" IPv6-hex) ":" IPv4-address-literal
IPv6v4-comp = [IPv6-hex *4(":" IPv6-hex)] "::"
[IPv6-hex *4(":" IPv6-hex) ":"]
IPv4-address-literal
; The "::" represents at least 1 16-bit groups of
; zeros. No more than 5 groups in addition to the
; "::" and IPv4-address-literal may be present.
Notes:
As per RFC 4291 and RFC 3986, "::" can represent a single 16-bit group of zeroes.
--VERIFIER NOTES--
As per RFC 5952:
4.2.2. Handling One 16-Bit 0 Field
The symbol "::" MUST NOT be used to shorten just one 16-bit 0 field.
For example, the representation 2001:db8:0:1:1:1:1:1 is correct, but
2001:db8::1:1:1:1:1 is not correct.