RFC 5321, "Simple Mail Transfer Protocol", October 2008Source of RFC: IETF - NON WORKING GROUP
Area Assignment: app
Errata ID: 1683
Reported By: Roberto Javier Godoy
Date Reported: 2009-02-15
Verifier Name: Alexey Melnikov
Date Verified: 2009-09-07
Section 4.4 says:
Additional-Registered-Clauses = CFWS Atom FWS String
It should say:
Additional-Registered-Clauses = 1*(CFWS Atom FWS String)
1. The rule Additional-Registered-Clauses is used by the rule Opt-info (also in section 4.4, page 59) as:
Opt-info = [Via] [With] [ID] [For] [Additional-Registered-Clauses]
2. The ABNF comment for Additional-Registered-Clauses states that "Additional standard clauses may be added in this location by future standards and registration with IANA."
3. Each sequence (CFWS Atom FWS String) represents a single clause.