On 08/03/19, Jasen Betts via Exim-users (exim-users@exim.org) wrote:
> > We're using a simple setup using Debian's packaged configurations which
> > I guess we will need to tweak.
>
> What you do is select split configuration, then you can insert
> configuration without debian's config management messing with
> it.
>
> > dns_yahoo_aol:
> > debug_print = "R: dnslookup_yahoo_aol for $local_part@$domain"
> > driver = dnslookup
> > domains = aol.com : yahoo.com
> > transport = remote_smtp_smarthost
> > route_list = mx.localrelay.com byname
> > same_domain_copy_routing = yes
>
> yahoo are tricky, they cover many domains, but I guess if you
> redirect the bulk theough your provider the remainder can pass viar
> direct smtp and be under the rate-limit.
>
> If I wanted to gatch more yahoo traffic I'd leave the domains restriction
> off and used an inverted ignore_target_hosts list with the IP addresses
> of the yahoo and aol MXs
>
> I's create a file called
>
> /etc/exim4/conf.d/routers/175_local_yahoo_warmup
>
> with
>
> NOT_YAHOO_MXEN= !98.137.159.0/24 : !66.218.85/24 : !67.195.229.0/24 :
> !74.6.137/24
>
> dns_yahoo_aol:
> debug_print = "R: dnslookup_yahoo_aol for $local_part@$domain"
> driver = dnslookup
> ignore_target_hosts = NOT_YAHOO_MXEN
> transport = remote_smtp_smarthost
> route_list = * mx.localrelay.com byname
> same_domain_copy_routing =
>
> then re-run sudo dpkg exim4-config and choose "split configuration" (into
> many small files)
>
> > The normal Debian exim4 config has
> >
> > route_list = * DCsmarthost byname
> > and
> > host_find_failed = ignore
> >
> > but I don't know if those are worth retaining.
>
> "DCsmarthost" only works if you chose smarthost in the first
> exim4-config setup menu, but you chose internet site (which seems the
> correct setting) so it'd be harmful here.
>
> > Comments gratefully received.
>
> adding this to the router
>
> conditon = ${if or{{<{67}{${randint:100}}}\
> {!first_delivery}}}
>
> Will leak 33% of the first delivery attempts though to the direct smtp
> delivery router, allowing you to warm up with yahoo, but if yahoo then
> rejcts them the retries will go through the smarthost router.
>
> That will produce some traffic from your IP address allowing warm-up
>
> If you want to get tricky you could make an expressiogn using
> $tod_epoch that tapers off the percentage over time.
>
> this will taper it off over 40 days
>
> conditon = ${if or{{>{$tod_epoch}\
> {${eval:1555539108+${randint:${eval:24*60*60*40}}}
> \}}{!first_delivery}}}
>
> I computed the constant "1555539108" by
>
> /usr/sbin/exim -be '${eval:24*3600*40+$tod_epoch}'
Dear Jasen
Thank you for the comprehensive and very interesting suggestions which
are really interesting.
The ignore_target_hosts idea is great; and the <{67} condition and the
40 day epoch techniques are super cool!
Thanks a lot for the expert suggestions.
Rory
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