Powermta Configuration Guide Top Jun 2026

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

: Group multiple VMTAs to distribute volume across several IPs. 3. Essential Authentication (SPF, DKIM, DMARC) powermta configuration guide top