Powermta Configuration Guide Top Jun 2026

<domain gmail.com> <limits> throttle 1000/hour error-throttle 500/hour on 4xx,5xx defer-throttle 200/hour on 421,450 </limits> </domain>

Create a dedicated listener for bounce/feedback mail: powermta configuration guide top

For high-volume senders, the disk I/O is often the bottleneck. &lt;domain gmail

Virtual MTAs are the heart of PowerMTA’s power. They allow you to separate traffic streams so one client’s bounce rate doesn’t destroy another’s IP reputation. throttle 1000/hour error-throttle 500/hour on 4xx

listener smtp0 port 25 interface 0.0.0.0 protocol smtp end listener

net.ipv4.ip_local_port_range = 1024 65535 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_fin_timeout = 30 net.core.somaxconn = 1024 net.core.netdev_max_backlog = 5000