Re: [exim] Fwd: Re: malfunctioning email delivery after upgr…

On Mon, Sep 12, 2022 at 06:27:08PM +0200, Ján Lalinský via Exim-users wrote:
> I've tried several times, including deleting contents of
> /var/spool/exim/db before starting the service. This did not help.

Try "exim -M <mid> -d+all" after clearing db and study its output
to locate source of delay.

As you reported possible DNS problems

> > On 04/09/2022 22:09, Ján Lalinský via Exim-users wrote:
> >> ==rcpt@???  R=xxx (-36): host lookup for <imap_server> did not
> >> complete (DNS timeout?)

combine this run with packet capture for DNS traffic on the same host,
something like "tcpdump -i any -s0 -nlUv port domain".
--
Eugene Berdnikov