Scott Baker:
> Can you email gurus clear something up for me once and for all. We've been
> in discussion around the office here for quite a while about doing mail
> relay/bagging.
>
> If I have a customer on a DSL line running a mail server and I setup
> Postfix to be the MX 20 record and catch mail should their DSL go
> down. When their DSL comes back up does their mail server come to me and
> issue the ETRN command? Or does our server poll theirs every so often and
> when it's back up ship the mail out?

Postfix retries deliveries, and increases the time between successive
attempts for a given message, from minimal_backoff_time seconds
(default: 1000) until maximal_backoff_time seconds (default: 4000).

So, if a site is connected most of the time, these retries will
take care of the occasional short outages.

On the other hand, if the site is disconnected frequently, then
mail will back up, and they'd better send an ETRN command to flush
the queue.

        Wietse

-
To unsubscribe, send mail to majordomopostfix.org with content
(not subject): unsubscribe postfix-users

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]