# License key provided by your vendor license-key "YOUR_LICENSE_KEY" # Publicly accessible hostname of your server host-name mail.yourdomain.com Use code with caution. Copied to clipboard 2. Listener Configuration
Below is a concise, production-ready example PowerMTA (PMTA) configuration focused on "hot" (high-throughput, reputation-conscious) email delivery. It includes global settings, listener(s), virtual MTAs, smart host routing, per-IP and per-domain throttling, bounce handling, and feedback loop/dkim/spf basics. Adjust names, IPs, domain, credentials, and limits for your environment.
While not in the config file text above, a truly "hot" configuration requires external setup:
; Bounce handling and feedback loops bounce-domain bounces.example.com sample powermta configuration file hot
bounce-log yes bounce-log-path /var/log/pmta/bounce bounce-server mailbounce.example.com bounce-smtp-port 25 max-bounce-recipients 100
v=spf1 ip4:192.168.1.10 ip4:192.168.1.11 include:spf.protection.outlook.com -all
The source block defines which IP addresses can feed messages into your PowerMTA instance: # License key provided by your vendor license-key
When your IP addresses and domains are fully warmed up, your PowerMTA (PMTA) configuration needs to shift from restrictive throttling to high-performance throughput. A "hot" configuration maximizes delivery speeds while maintaining strict compliance with ISP guidelines to protect your sender reputation.
<!-- FEEDBACK LOOPS (Reputation Management) --> <fbl-account your-fbl-key> <feedback-loop> domain hotmail.com domain yahoo.com process-bounces yes remove-headers yes </feedback-loop> </fbl-account>
max-simultaneous-delivery-attempts 1000 max-msg-size 50M max-msg-headers-size 128K max-recipient-count 1000 !-- FEEDBACK LOOPS (Reputation Management) -->
# Authentication settings auth_type = "auth_file" auth_file = "/etc/powermta/auth_file"
# Logging log_level = 3 log_file = /var/log/powermta.log
Below is a conceptual example of a configuration designed for a high-performance environment with multiple IPs and ISP-specific tuning.