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Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?

John Levine <johnl@taugh.com> Sun, 19 July 2020 14:44 UTC

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From: John Levine <johnl@taugh.com>
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Subject: Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?
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In article <CAKFo7wk+jLGqjs6mU=Gv3G1xAg+O5OyTmt66fjW4DLzUT5kuPw@mail.gmail.com> you write:
>I think a header value limit for important headers stored in overview
>systems (From:, To:, Newsgroups:, Bcc:, etc...) could be a good
>idea... 

There's no formal limit other than the line length, but there is a registry of 
header names, shared among mail, netnews and uucp:

https://www.iana.org/assignments/message-headers/message-headers.xhtml

Adding new names to the registry requires expert review and I expect
the expert would be sceptical of proposed names that were a lot longer
than the existing ones. I don't see any over 35 characters which seems
reasonable.

R's,
John

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