Re: Mail ID format

(I am quoting a bit too much for the likings of usenet posting scripts,
 but never mind..)

> On Mon, 1 Jun 1998, Matti Aarnio wrote:
> 
> > > What is format of zmailer's mail id? 
> > > I mean how can I decode from the id the time e-mail was sent?
> >   Indeed you can, lets pick a sample:
> > Message-Id: <19980601143757Z2848-6117+4@nic.funet.fi>
> >              YYYYMMDDhhmmssZnnnn-nnn+nn@hostname
> 
> Oops, I meant SMTP id. 
> 
> Here's a piece of sendmail's header:
> ===
> Received: from mx.supermedia.pl (mx.supermedia.pl [195.116.124.27])
>         by lama.supermedia.pl (8.8.7/8.8.5) with ESMTP id KAA28391
>         for <stroker@lama.supermedia.pl>; Mon, 1 Jun 1998 10:11:58 +0200
> ===
> 
> ESMTP id is "KAA28931" where first letter indicates hour (A for
> 0, B for 1 and so on).
> 
> And here's zmailer's header:
> ===
> Received: from sas91248.sas.com ([192.58.191.248] EHLO auerhahn.eur.sas.com
>	ident: TIMEDOUT [port 43012]) by mx.supermedia.pl with ESMTP id
>	<538911-10208>; Mon, 1 Jun 1998 10:11:09 +0200
> ===
> 
> ESMTP id is "<538911-10208>". Is there any relation between this id and
> time message has arrived to server?

	No, the "id" tells just the spool file i-node number catenated with
	router process-id number.  There is a timestamp at the end of the
	"Received:" header, and it tells the exact arrival time of the message
	into your system.

	At a bit earlier versions it told the time when the router did
	start handling of the message, but arrival time is more usefull
	data, IMO.

> * Piotr Glaska          *        Supermedia         *
> * Systems Administrator * Internet Service Provider *
> * MCP+Internet          * http://www.supermedia.pl/ *

/Matti Aarnio