Well, I live in the land of "sendmail familiar", but quite a distance from
"sendmail guru".
All I've ever done is put the domain for the email in /etc/mail/relay-domains
and restart sendmail.
EG: If host is a backup relay for snafoo.com, type "snafoo.com" in a line all
by itself in /etc/mail/relay-domains.
It takes it from there. If the primary host goes down for > 4 hours, senders
start getting notice messages. If primary host goes down for > 48 hours,
senders start getting "undeliverable" messages back.
-Ben
On Wednesday 11 January 2006 23:01, Mohd Ikhwan Bin Abdullah wrote:
> I would like to know is there anyone who know how to or a site with the how
> to on configuring a sendmail box to queue the mail only when the primary
> mail server is down. And when the primary mail server is up it will issue an
> ETRN command to the queue server to start processing and pushing the mail
> that is queued to the primary server.
>
> I am very much aware about the MX record priority on the DNS server but just
> need to configure the secondary mail server only.
>
> Thank you.
>
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