Configuration Guide Top — Powermta

Version 6.0 introduced automatic MX rollups, which simplifies configuration and maintenance compared to manual MX rollups by intelligently grouping domains that share the same mail servers. This is a significant improvement for large-scale senders.

$ grep "dsn=" /var/log/powermta/panic.log | cut -d' ' -f5 | sort | uniq -c 1200 dsn=2.0.0 (Success) 45 dsn=5.1.1 (Bad destination) 12 dsn=4.2.2 (Mailbox full)

# General Host Settings host-name ://yourdomain.com http-mgmt-port 8080 http-access 192.168.1.0/24 admin http-access 127.0.0.1 admin # Logging and Resource Allocation log-file /var/log/pmta/log max-msg-rate 500/m Use code with caution. Key Considerations

This guide covers the essential components of a high-level PowerMTA configuration, focusing on performance, deliverability, and security. 1. The Foundation: Global Settings powermta configuration guide top

# Global settings or specific domain retry-interval 5m # Wait 5 mins before retry max-retries 10 # Give up after 10 tries

smtp-source-host 1.2.3.4 # Your dedicated IP host-name ://example.com Use code with caution. Copied to clipboard By grouping these into a

v=spf1 ip4:YOUR.SERVER.IP include:_spf.google.com -all Version 6

When a domain returns a 4xx error (temp fail), PMTA puts it in a "penalty box." This defines the starting seconds.

<domain *> max-msg-rate 5000/h max-connect-rate 100/h </domain>

: Use these to manage headers and control which sources can relay through your server. DKIM Signing : Implement 2048-bit DKIM keys for authentication. Rate Limiting max-smtp-out max-msg-per-connection to avoid overwhelming ISPs. For example, setting max-msg-per-connection 100 aligns with most ISP acceptance rates. 3. Advanced Deliverability Features Which SMTP Port to Use? Understanding ports 25, 465, & 587 Copied to clipboard By grouping these into a

Proper authentication is non‑negotiable. Without it, your mail will be flagged as spam or rejected outright.

The max-cold-virtual-mta-msg directive caps daily messages for recipients lacking prior engagement history: