Sample Powermta Configuration File Hot Jun 2026

# ===================================================================== # PowerMTA Custom Directive Template for Hotmail / Outlook / Live / Msn # ===================================================================== # --- Queue Management --- queue-to hotmail.com # Groups all Microsoft variants into a single queue retry-interval 30m # Wait 30 minutes before retrying deferred emails max-retry-time 4d # Keep trying to deliver for up to 4 days # --- Connection and Traffic Control --- max-smtp-out 20 # Maximum concurrent SMTP connections from this server max-msg-per-connection 100 # Close connection and open a new one after 100 emails max-errors-per-connection 5 # Drop the connection early if multiple errors occur # --- Delivery Rate Limits (Throttling) --- max-msg-per-hour 5000 # Global cap per hour for this specific domain group min-retry-interval 15m # Minimum delay between retries for temporary failures # --- Bounce and Error Handling --- bounce-on-4xx-status false # Do not bounce emails permanently on 4xx temp errors log-delivery-failures true # Record detailed failure logs for debugging log-fallback-failures true # Record fallback routing logs # --- Automated Backoff (Critical for Microsoft Filters) --- # If Microsoft responds with standard throttling codes, reduce traffic 421 RP-001 *, 1h, 5, 1000 # Back off for 1 hour, drop connections to 5, max 1000/hr 421 4.3.2 *, 45m, 2, 500 # Server busy code: Back off 45 mins, drop to 2 connections # --- Security and Authentication --- use-starttls yes # Enforce TLS encryption for secure transit require-starttls no # Fall back to clear text only if remote server lacks TLS dkim-sign yes # Force DKIM signing on all outgoing items Use code with caution. Critical Directive Breakdown 1. Queue Consolidation ( queue-to )

In the sample above, notice the virtual-mta-pool . If you are sending both marketing newsletters and password reset emails (transactional) from the same server, you are risking your reputation. If your marketing list is dirty, it could get your IP blocked, stopping password reset emails. sample powermta configuration file hot

<domain default> max-msg-rate 200/s max-smtp-out 50 bounce-after 4d retry-after 30m </domain> If you are sending both marketing newsletters and

<max-cpu-usage>90</max-cpu-usage> Use the http-mgmt-port (8080 in the sample) to

Are you configuring this for a that needs warming up, or an established IP ?

Use the http-mgmt-port (8080 in the sample) to watch your queues in real-time. If you see a "backoff" status, lower your max-smtp-out immediately.

Unlike banking emails, lifestyle emails have a . A concert invite is worthless 2 hours after the show starts. We adjust the queue management accordingly.