Re: <quoted-string>s in <msg-id>s (Re: Compatibility wit Netnews (was I-D ACTION:draft-resnick-2822upd-01.txt))

Kari Hurtta wrote, answering either Pete Resnick or Charles Lindsay:
>> But if 2822-bis is prepared to go further than that, then it is fine 
>> with me. The only question is whether people ever (or ever need to) 
>> use <quoted-string>s in <msg-id>s. I looked in all the news articles 
>> and
>>  emails on my computer and found no example of it, but my sample is 
>>  far too small. So has anyone else seen that in the wild?
>
> At least on my archive folder have some:
>
> $ egrep ^Message-ID: elm-mail-backup | fgrep '"'
> Message-ID: <"xlink100.x.795:21.07.96.17.56.16"@xlink.net>
> ...
> $
>
> These archived messages seems to be from year 1996

One of formail, procmail and smartlist also generated message-ids 
containing quoted-string around that time. AFAICR the format was 
"word.word.word"@hostname.

I've looked at around 100,000 recent message-ids and found none that 
required quoted-string.

Arnt