Re: Header change in maling lists?

[Bruce Anderson <brucea396%comcast.net@localhost>]

On Thu, 2020-11-05 at 15:43 +0530, Mayuresh wrote:
> On Thu, Nov 05, 2020 at 02:20:07AM -0600, Bruce Anderson wrote:
> > Use:
> > * ^List-Id:.*current-users.NetBSD.org
> 
> I adopted procmail, but curious why angled brackets are added to a string
> of the domain name form.


See  rfc 2822
Special characters used in other parts of the syntax
------------------------------
3.2.1. Primitive Tokens [Pages 9 and 10  BA-]

https://tools.ietf.org/html/rfc2822#section-3.2.1

specials     =       "(" / ")" /   ; Special characters used in
                     "<" / ">" /   ;  other parts of the syntax
                     "[" / "]" /
                     ":" / ";" /
                     "@" / "\" /
                     "," / "." /
                     DQUOTE
....
3.2.5. Quoted strings

https://tools.ietf.org/html/rfc2822#section-3.2.5
....
   Strings of characters that include characters other than those
   allowed in atoms may be represented in a quoted string format, where
   the characters are surrounded by quote (DQUOTE, ASCII value 34)
   characters.

qtext          =     NO-WS-CTL /  ; Non white space controls

                     %d33 /       ; The rest of the US-ASCII
                     %d35-91 /    ;  characters not including "\"
                     %d93-126     ;  or the quote character

qcontent       =     qtext / quoted-pair

quoted-string  =     [CFWS]
                     DQUOTE *([FWS] qcontent) [FWS] DQUOTE
                     [CFWS]
....

**************************************

examples:

List-Id: NASA News Releases <hqnews.newsletters.nasa.gov>
List-Id: General discussion <gnome-list.gnome.org>

Better:
List-Id: "General discussion" <gnome-list.gnome.org>