--------------Replied message--------------
Date: Sat, 09 Jan 1999 23:14:23 +1030
From: Stephen Davies <[EMAIL PROTECTED]>
To: Derek Sims <[EMAIL PROTECTED]>
Cc: Gerard Paul Java <[EMAIL PROTECTED]>,
Linux-net <[EMAIL PROTECTED]>
Subject: Re: virtual mail +Exchange
<snip>
Please excuse my ignorance, but why/when is an
ETRN request necessary?
On the odd occasion when my link goes down, mail
transfer recommences within a
few seconds of reconnecting without any ETRN
requests (at least there are no
explicit requests).
Stephen.
ETRN is IMHO designed for mail servers that are
only connected to Internet intermittently. The
default action for a mail relay is to try
forwarding, and is it fails, to queue for retry.
Normally retries are made less and less
frequently as the queued message gets "older".
If the target host connects every 30 minutes for
2 minutes, it ould miss all the retries.
ETRN tells the relay the target is on-line, and
requests an immediate retry of any queued
messages
Hope this is what you wanted to know.
Rgds,
Derek
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