I believe this is not an Exim-problem, but you can:
1) Take down the DNS and the exim machine, start sniffing on the host,
power up the exim machine:
# tcpdump -i eth? port 53
# start exim-machine
to see what it is querying, add those entries to /etc/hosts in the
exim-machine
and "supposedly" no more delays are going to occur.
--
Fabio Martins
http://nabundapode.com.br/
On 2021-11-08 10:20, JHM via Exim-users wrote:
> Hello:
>
> My box runs Devuan Beowulf and within it runs a (VBox) Devuan ascii
> virtual machine set up
> to start up automatically when I boot.
>
> It is not kept on 24/07 but is booted up a few times every 24 hours.
>
> The Devuan ascii virtual machine runs PI-Hole as a recursive DNS
> server.
> It is all working as it should but there's a 'snag in the weave' so to
> speak:
>
> When booting, I'm getting a (not too) short delay at "Starting MTA:"
> which is when (as I
> understand it) Exim4 does a reverse DNS check.
>
> The problem is that my DNS (unbound) runs on the Devuan ascii virtual
> machine which I set
> up to start up automatically at boot but it is not yet up and running
> when Exim4 does the
> reverse DNS check.
>
> Hence the delay (30/40s?) I am refering to.
>
> Exim4 is set up to receive "local delivery only; not on a network",
> listens only to IP 127.0.0.1
> for incoming SMTP connections and accepts my box's user as the only
> other destination for
> which mail is accepted.
>
> As I am on a wired ADSL connection and have "always on" web access,
> "Dial-on-Demand"
> configuration is disabled.
>
> Is there a way I can avoid the "Starting MTA:" delay at boot?
>
> Thanks in advance,
>
> JHM
