On Fri, Jul 06, 2001 at 10:46:34AM -0400, Dan York <[EMAIL PROTECTED]> wrote:
> Richard,
>
> > Or use no secondary MX and have faith in the fact most email servers are set
> > to try again for 4 days? :)
>
> Exactly.
No, no, no!
If you have a transient link which is mostly down (as in Dean's case), you
_will_ bounce mail. Most mail servers lengthen their retry timers as mail
gets older, so your chance of actually getting the mail on a transient
link decreases as time passes. SMTP is designed for mostly up connections.
MX records should never point to "mostly down" sites. If you do this,
make sure there is an "almost always up" site as a secondary MX.
> [..]
> Correct. Not every ISP implements it. I believe most of the major
> mail servers support it... (i.e. sendmail, qmail, etc.)... but
> additional configuration needs to be done. (At least, that is my
> understanding.)
qmail does not support ETRN
Dean - if your ISP uses qmail you can safely use multi-drop fetchmail,
sorting on the Delivered-To header. qmail guarantees individual deliveries,
so the multi-drop problems with mailing lists do not occur.
You could investigate serialmail and autoturn, but that will require more
co-operation from your ISP. Some will do it, many won't.
Thanks,
Gordon
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