Hello Paul, On Tue, 07 May 2002 10:10:37 -0400 (07.05.02 20:10 my local time) you wrote about "Message-id composition?" at least in part:
PDR> is there a better place/person to ask the question of? RFC-2822, para 3.6.4 ----->8-------------------------------------- from WinClipboard Though optional, every message SHOULD have a "Message-ID:" field. Furthermore, reply messages SHOULD have "In-Reply-To:" and "References:" fields as appropriate, as described below. The "Message-ID:" field contains a single unique message identifier. The "References:" and "In-Reply-To:" field each contain one or more unique message identifiers, optionally separated by CFWS. The message identifier (msg-id) is similar in syntax to an angle-addr construct without the internal CFWS. message-id = "Message-ID:" msg-id CRLF msg-id = [CFWS] "<" id-left "@" id-right ">" [CFWS] id-left = dot-atom-text / no-fold-quote / obs-id-left id-right = dot-atom-text / no-fold-literal / obs-id-right no-fold-quote = DQUOTE *(qtext / quoted-pair) DQUOTE no-fold-literal = "[" *(dtext / quoted-pair) "]" The "Message-ID:" field provides a unique message identifier that refers to a particular version of a particular message. The uniqueness of the message identifier is guaranteed by the host that generates it (see below). This message identifier is intended to be machine readable and not necessarily meaningful to humans. A message identifier pertains to exactly one instantiation of a particular message; subsequent revisions to the message each receive new message identifiers. The message identifier (msg-id) itself MUST be a globally unique identifier for a message. The generator of the message identifier MUST guarantee that the msg-id is unique. There are several algorithms that can be used to accomplish this. Since the msg-id has a similar syntax to angle-addr (identical except that comments and folding white space are not allowed), a good method is to put the domain name (or a domain literal IP address) of the host on which the message identifier was created on the right hand side of the "@", and put a combination of the current absolute date and time along with some other currently unique (perhaps sequential) identifier available on the system (for example, a process id number) on the left hand side. Using a date on the left hand side and a domain name or domain literal on the right hand side makes it possible to guarantee uniqueness since no two hosts use the same domain name or IP address at the same time. Though other algorithms will work, it is RECOMMENDED that the right hand side contain some domain identifier (either of the host itself or otherwise) such that the generator of the message identifier can guarantee the uniqueness of the left hand side within the scope of that domain. ----->8-------------------------------------------------------- -- Best regards, Alexander Leschinsky - MOTD: The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I found it!) but 'That's funny ...' Isaac Asimov ______________________________________________________ Archives : http://tbtech.thebat.dutaint.com Moderators : mailto:[EMAIL PROTECTED] Unsubscribe: mailto:[EMAIL PROTECTED]
