Powermta Configuration Guide ★ Quick & Extended
<domain *> # Default for all domains max-smtp-out 5 max-msg-rate 100/h use-starttls if-available </domain> Gradually increase volume per source IP.
systemctl start powermta systemctl enable powermta | File | Purpose | |------|---------| | /etc/powermta/powermta.conf | Main configuration | | /etc/powermta/config.d/ | Include directory (modular configs) | | /etc/powermta/license.key | License file | | /var/log/powermta/ | Logs (delivery, bounce, error) | | /var/spool/powermta/ | Queue spool (persistent) | 4. Basic Configuration Directives 4.1 Global Settings # /etc/powermta/powermta.conf smtp-port 25 http-mgmt-port 8080 http-mgmt-interface 0.0.0.0 max-smtp-in 1000 max-smtp-out 1000 smtp-greeting "PowerMTA ESMTP" Queue management max-queue-size 10M # Maximum spool size queue-interval 5s # Dequeue sweep frequency max-delivery-attempts 5 # Per recipient 4.2 Source (Binding) IPs Define which IPs PMTA will use to send mail. powermta configuration guide
http-mgmt-port 8080 http-mgmt-interface 127.0.0.1 Always validate config before reload: <domain *> # Default for all domains max-smtp-out
curl -u user:pass http://pmta-server:8080/api/v1/stats 8.1 Memory & I/O queue-shards 16 # Reduce lock contention memory-pool-max 2G spool-buffer-size 512k max-message-size 50M 8.2 Adaptive Throttling Automatically slow down when remote servers defer. http-mgmt-port 8080 http-mgmt-interface 127
openssl genrsa -out /etc/powermta/keys/example-dkim.key 2048 openssl rsa -in example-dkim.key -pubout -out example-dkim.pub # Add public key to DNS: mail._domainkey TXT "v=DKIM1; k=rsa; p=..." <domain example.com> bounce-domain bounces.example.com # VERP bounces spf-identity mfrom # Use MAIL FROM for SPF </domain> 6.3 IP Restrictions (Inbound Relay) <accepted-connect 127.0.0.1> allow-submission yes require-auth no </accepted-connect> <accepted-connect 10.0.0.0/8> allow-submission yes require-auth yes auth-plain /etc/powermta/passwd </accepted-connect> 7. Logging & Monitoring 7.1 Delivery Log Format log-format-extended "mail.log" "%ts %d %r %s %S %T %p %b %B" # Fields: timestamp, domain, recipient, status, size, time, IP, bounce, message-id 7.2 Bounce Processing bounce-log /var/log/powermta/bounce.log bounce-category-log /var/log/powermta/bounce-category.log permanent-bounce-after 7d # Suppress after 7 days of soft bounces 7.3 HTTP API & SNMP http-mgmt-port 8080 http-mgmt-interface 0.0.0.0 http-mgmt-auth /etc/powermta/htpasswd snmp-port 161 snmp-community public
Start & enable:
