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RFC 2047, "MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII Text", November 1996

Source of RFC: 822ext (app)

Errata ID: 504
Status: Verified
Type: Technical

Reported By: Jose M. Cainzos
Date Reported: 2001-11-10

Section 5 says:

   (2) An 'encoded-word' may appear within a 'comment' delimited by "(" and
       ")", i.e., wherever a 'ctext' is allowed.  More precisely, the RFC
       822 ABNF definition for 'comment' is amended as follows:

       comment = "(" *(ctext / quoted-pair / comment / encoded-word) ")"

       A "Q"-encoded 'encoded-word' which appears in a 'comment' MUST NOT
       contain the characters "(", ")" or "
       'encoded-word' that appears in a 'comment' MUST be separated from
       any adjacent 'encoded-word' or 'ctext' by 'linear-white-space'.

It should say:

   (2) An 'encoded-word' may appear within a 'comment' delimited by "(" and
       ")", i.e., wherever a 'ctext' is allowed.  More precisely, the RFC
       822 ABNF definition for 'comment' is amended as follows:

       comment = "(" *(ctext / quoted-pair / comment / encoded-word) ")"

       A "Q"-encoded 'encoded-word' which appears in a 'comment' MUST NOT
       contain the characters "(", ")" or "\".  In addition, an
       'encoded-word' that appears in a 'comment' MUST be separated from
       any adjacent 'encoded-word' or 'ctext' by 'linear-white-space'.

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