ietf-822
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Re: Message-ID practical maximum size

2003-08-24 11:21:39


on 8/24/2003 12:28 PM Dave Crocker wrote:

Didn't see any length recommendations for Message-ID, in RFC2821.

What do folks suggest for the largest maximum size of the left-hand
field of a message-id (id-left)?

Son-of-1036 defines a maximum message identifier length of 250 characters
for the entire ID, including the domain element and angled-brackets.

RFC 2822 prohibits folding in the message identifier header field, so the
maximum length of the header field value is 986 characters (998 characters
minus 12 characters for the Message-ID header field name and the
separating Colon and Space characters).

Subtract the minimum and maximum domain lengths from 986 to produce the
minimum and maximum theoretical length of the left-hand side.

-- 
Eric A. Hall                                        http://www.ehsco.com/
Internet Core Protocols          http://www.oreilly.com/catalog/coreprot/


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