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Re: alternatives to ETRN
> Hi gang,
> We have quite a few dialup users who for some warped reason like to
> do SMTP over their connection, but don't want to stay online for prolongated
> periods of time.
> We had a hack where they could send a message to an address and in response
> sendmail would rerun the whole queue, sending the user's message if he was
> This feature placed an unnecessary burden on our mailserver what's already
> swamped, so I wonder if anyone has a solution for zmailer where it would try
> to resend mail for a specified domain if it gets a specific mail?
For quite a while ZMailer's scheduler has operated in such a way
that if there is a new message going to Channel-C/Host-H, and the
system has resources available to run a new (or recycled) transport
agent, then appearance of the new job will run ALL accumulated jobs
to that particular target at the same time.
would make sure that any such thread be retried only every 12
hours, although (as I said above) appearance of a new message
will also cause run attempt.
What ever, it will use up only one transport agent, which operates
independent of all of the other message flows going around.
That is, it will not cause significant slowdown to the system, not even
when there are thousands of messages going to that one thread...
(All this assuming you don't have too many of such targets with huge
queues in your system -- like several dozens of them ...)
With 2.99.49p5 there is configuration flag "queueonly", which
just accumulates the target thread(s), but will never automatically
start the queueing. Instead, the target Host-H MUST be triggered
by explicite "ETRN Host-H" command thru the smtpserver.
This will, of course run all channels with Host-H, however I thought
that to be a minor nuisance instead of demanding things like "it must
be in 'smtp' channel" -- because I think it will be easiest to have
explicite 'route' entry telling something like:
and associated scheduler.conf target:
command="smtp -c smtp-etrn ..."
For that route example the necessary ETRN is:
> Sorry for the long winded message, my english still sucks.
Long ? I can hardly think of shorter form to describe your
question. Your english appears rather good, as even I do
make mistakes there. In my native language we don't have
these 'meaningless' fillers like 'a', 'an' and 'the', and
thus I tend to occasionally forget them.. ( And all languages
with gender differentiation are also difficult, Finnish is
definitely gender-equal -- people/animals (he/it) difference
exists, but there is no male/female (he/she) difference.
OTOH, our head of parliament is a woman, while her title is
'chairman' ...) (( But this is long-winded non ZMailer topic. ))
/Matti Aarnio <firstname.lastname@example.org>