control: severity -1 minor control: tag -1 moreinfo, unreproducible control: retitle -1 DNS resolution not working at boot time
You haven't posted your full log. Are the dnsmasq and fetchmail services possibly starting before dhclient? If that was the case at the time systemd may be better at ordering services now. Avahi also might introduce its own problems too. Have you tried not using that? Best wishes, Mike

