> Don't chroot the Postfix smtp delivery agent. It will then notice
> changes in /etc/resolv.conf, rather than using a stale copy in
> the chroot jail. Better don't use chroot at all, unless it is
> very carefully and robustly built.
Ha!
# find /var -name resolv.conf
/var/spool/postfix/etc/resolv.conf
# cat /var/spool/postfix/etc/resolv.conf
# Generated by NetworkManager
#
That explains the behavior! Thank you very much.
I'm not sure why /var/spool/postfix/etc/resolv.conf is empty: the only
time it should be empty is "right when I suspend/wake-up", since it's
the only time the wifi connection is not up. So apparently some part of
Debian somehow refreshes /var/spool/postfix/etc/resolv.conf when waking
up, which ends up doing exactly the wrong thing.
Anyway, I installed `resolvconf` and preliminary testing indicates that
it might circumvent the problem.
Thank you very much,
Stefan
