# ===================================================================== # PowerMTA Configuration File for Hot / Active IPs # ===================================================================== # --- GLOBAL SETTINGS --- log-file /var/log/pmta/pmta.log http-mgmt-port 8080 http-access 127.0.0.1 admin http-access 192.168.1.0/24 admin # --- INBOUND SMTP SETTINGS (STATIONARY) --- smtp-listener 192.168.1.50:25 always-allow-relaying yes process-x-virtual-mta yes always-allow-relaying yes process-x-virtual-mta yes # --- VIRTUAL MTA & IP BINDING --- smtp-source-ip 192.168.1.101 host-name ://yourdomain.com smtp-source-ip 192.168.1.102 host-name ://yourdomain.com virtual-mta vmta-hot-01 virtual-mta vmta-hot-02 # --- GLOBAL PERFORMANCE TUNING --- max-msg-rate/h 50000 max-errors-per-connection 10 bounce-delete-after 2d retry-after 15m # --- RECIPIENT DOMAIN SETTINGS (HOT IP OPTIMIZATION) --- # Default settings for standard domains max-smtp-out 20 max-msg-per-connection 100 retry-after 30m bounce-delete-after 3d # Optimized settings for Gmail / Google Workspace max-smtp-out 100 max-msg-per-connection 500 max-msg-rate/h 20000 dkim-sign yes use-starttls yes require-starttls no # Optimized settings for Yahoo / AOL / Verizon Media max-smtp-out 40 max-msg-per-connection 200 max-msg-rate/h 10000 inter-msg-delay 100ms dkim-sign yes # Optimized settings for Microsoft (Outlook, Hotmail, Live) max-smtp-out 50 max-msg-per-connection 300 max-msg-rate/h 15000 use-starttls yes # --- AUTHENTICATION & SECURITY --- dkim-key /etc/pmta/dkim/key.private, d1, yourdomain.com # --- ADVANCED QUEUE MANAGEMENT --- pattern .* normal Use code with caution. Detailed Breakdown of Key Configurations 1. Inbound Access Control ( )
Microsoft limits traffic based on your IP reputation, sender history, and validation protocols. If you open too many simultaneous connections or send messages too quickly from a new or cold IP address, Microsoft will issue 421 RP-001 or 550 SC-001 error codes. To satisfy their filters, your configuration must enforce: sample powermta configuration file hot
source default-domain * use-vmta main-sender domain google.com use-vmta warmup-sender domain yahoo.com use-vmta warmup-sender If you open too many simultaneous connections or
In the high-stakes world of transactional and marketing email delivery, the Postfix and Sendmail servers of the world are like reliable family sedans. They get you from A to B. But when you need to drive a Ferrari at 200 miles per hour without it bursting into flames, you need . But when you need to drive a Ferrari
; Bounce handling and feedback loops bounce-domain bounces.example.com
# ------------------------------------------------------------ # PowerMTA Hot Configuration File v4.5+ # Optimized for: 500k - 2M emails/hour # Key features: Multi-IP warmup, ISP throttling, DKIM, Feedback Loop # ------------------------------------------------------------
Major email providers enforce distinct throttling thresholds. Override global settings for each:
