Re: MX/ISP BLOCK

Thus said Manvendra Bhangui on Fri, 08 Feb 2019 21:28:58 +0530:

> 4. Write the following script as qmail-remote in /var/qmail/bin. Asume
> w.x.y.z is the IP of the ISP
> #!/bin/sh
> domain=$1
> /var/qmail/bin/dnsmxip $1 |awk '{print $2}'| while read line
> do
>     if [ " $line" = " w.x.y.z" ] ; then
>         exec cat > /dev/null
>     fi
> done
> exec /var/qmail/bin/qmail-remote.org $*

Nice idea, however,  unless this outage is expected to  be permanent, it
discards potentially legitimate email.

Instead, maybe the message should be  queued elsewhere and then just put
on a deferred schedule for deliveries.

Might be better to setup a second instance of qmail and instead:

#!/bin/sh
domain="$1"
/var/qmail/bin/dnsmxip "$1" |awk '{print $2}'| while read line
do
    if [ " $line" = " w.x.y.z" ] ; then
        exec /var/qmail-delayed/bin/qmail-remote "$@"
    fi
done
exec /var/qmail/bin/qmail-remote "$@"

Andy
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