Hello and thanks for answering. The Mail Rule Sets seems set correctly
(as standard). I don't have any delivery priority unfortunately, i
really don't know why (see screenshot). We do have the heatmap and yes
we are running many workflows, sometime we are running too much at the
same time and we are looking into that too. But when i look at some
previous deliveries where we sent 100+k emails (without waves or Wait
nodes) i see that during late evenings/nights the volumes increase from
7-8k per h...