<vmta travel-hub> max-smtp-out 50 bind-address 192.168.1.12 use-starttls yes </vmta>
<source 192.168.1.10> # VIP Luxury DKIM Signature dkim-sign yes dkim-signature vip-luxury dkim-identity "news@luxury-lifestyle.com" dkim-headers "From:Subject:To:Date" dkim-key-selector "pmta2024" dkim-signature-private-key-file "/etc/pmta/dkim/private_vip.pem" </source> sample powermta configuration file hot
# ========================================================== # PowerMTA Hot Configuration Sample (2026) # ========================================================== # -- Global Settings -- http-access 127.0.0.1 admin http-access YOUR_SERVER_IP admin # Replace with your local IP for GUI access http-port 8080 # Define the server hostname host-name mta.yourdomain.com postmaster admin@yourdomain.com # -- Authentication & Security -- domain-key *, *, /etc/pmta/dkim.key # -- IP Rotation/Virtual MTAs (Example: 3 IPs) -- smtp-source-host 1.1.1.1 mta1.yourdomain.com smtp-source-host 1.1.1.2 mta2.yourdomain.com smtp-source-host 1.1.1.3 mta3.yourdomain.com # -- High Throughput Rules (The "Hot" Part) -- max-smtp-out 500 # Increase per destination domain max-msg-per-connection 1000 # Higher number = less reconnection max-conn-rate 10/s # Aggressive connection rate connect-timeout 30s smtp-source-host 1.1.1.1 # Default sending IP dkim-sign yes enable-starttls yes require-starttls no # -- Gmail Aggressive Handling (Keep it warm) -- max-smtp-out 100 max-msg-per-connection 100 max-conn-rate 5/s # -- SMTP Users (For MailWizz/Oempro) -- password your_strong_password source pmta-auth1 always-allow-relaying yes process-x-virtual-mta yes default-virtual-mta mta-pool # Use the pool defined above add-received-header false hide-message-source true # -- Accounting & Logs (Keep minimal for performance) -- log-connections no log-commands no log-data no # log-file /var/log/pmta/log # Only uncomment for debugging accounting-file /var/log/pmta/acct.csv accounting-interval 15m Use code with caution. Copied to clipboard Key "Hot" Configuration Components <vmta travel-hub> max-smtp-out 50 bind-address 192
# ------------------------------------------------------------------ # PowerMTA Configuration File - High Volume (Hot) Setup # ------------------------------------------------------------------ # --- Basic Settings --- # Replace with your actual server hostname smtp-server-hostname ://yourdomain.com http-mgmt-port 8080 http-mgmt-acl 127.0.0.1 192.168.1.0/24 # Allow access only from trusted IPs log-file /var/log/pmta/pmta.log log-rotate 10 10M # --- Source and Security --- # Define authorized IPs that can send through this PMTA server always-allow-relaying yes smtp-service yes process-x-virtual-mta yes # Optional: Authentication (Recommended if public) # auth-clients auth-user-1 # --- DKIM Signing --- # Assuming your domain is yourdomain.com dkim-key /etc/pmta/yourdomain.com.pem dkim-selector selector1 dkim-sign yes # --- Virtual MTAs (IP Pooling) --- # Define Virtual MTAs for different IPs to spread reputation smtp-source-ip 192.0.2.10 # Replace with IP 1 # Example to add dkim to vmtas # dkim-key /etc/pmta/key1.pem # dkim-selector selector1 # dkim-sign yes smtp-source-ip 192.0.2.11 # Replace with IP 2 # Create a pool to use virtual-mta vmta1 virtual-mta vmta2 # --- Domain-Specific Rules (Hot Settings) --- # Default rules for unknown/other domains max-smtp-out 20 max-msg-per-connection 50 max-msg-rate 500/m # Optimized rules for Major ISPs (High Volume) max-smtp-out 50 max-msg-per-connection 100 max-msg-rate 2000/h # Recommended: Use dedicated IP for Gmail # vmta-pool mta-pool1 max-smtp-out 40 max-msg-per-connection 80 max-msg-rate 1500/h max-smtp-out 30 max-msg-per-connection 60 max-msg-rate 1000/h # --- Performance Tuning --- smtp-out-max-concurrency 1000 smtp-out-max-msg-per-connection 100 smtp-out-max-msg-rate 10000/m Use code with caution. Detailed Directive Breakdown 1. virtual-mta & virtual-mta-pool Ensure these external factors are configured alongside your
Even with max-per-host-out 100 , Gmail will reject if you exceed 60 connections per IP. The sample config uses domain throttling ( domain throt-google.com ) as a safety net.
A perfect configuration file cannot overcome poor server setup or bad sending habits. Ensure these external factors are configured alongside your PowerMTA deployment:
