[Service] LimitNOFILE=1000000 Split traffic by sender domain:
sudo /usr/sbin/pmta checkconfig Then reload: Powermta 5.0 Download-
sudo systemctl reload pmta # Graceful reload (no queue loss) PowerMTA 5.0 in its out-of-the-box state is conservative. For mass sending, tune these parameters: a) Increase File Descriptors Edit /etc/systemd/system/pmta.service.d/override.conf : Powermta 5.0 Download-