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Tag Wiki 'Message-id'.


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Message-ID is a unique identifier for a digital , most commonly a globally unique identifier used in and .
(2019). 9780121631048, .

Message-IDs are required to have a specific format which is a subset of an RFC5322 – Internet Message Format and to be globally unique. That is, no two different messages must ever have the same Message-ID. A common technique used by many message systems is to use a time and date stamp along with the local host's domain name, e.g., RFC2392 – Content-ID and Message-ID Uniform Resource Locators On the other hand, if two messages have the same Message-ID, they are presumed to be the same one and one version is discarded. But, as Google MTAs (message transfer agents) mangle the ones of Outlook, several same messages may coexist with original and mangled ones and create problems in referencing each other for threading.

Message-IDs, if present, are generated by the client program sending the email (, or MUA) or by the first mail server (mail submission agent, or MSA). RFC5322 – Internet Message Format

Mails to public mailing-lists and news groups can be found via their Message-ID by using links from various services:

See also

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