Sample Powermta Configuration File Hot Jun 2026

source /0 # Matches all connecting IPs always-allow-relaying true process-x-virtual-mta yes remove-received-headers false add-received-header true hide-message-source false require-auth true

Your primary (e.g., mostly Gmail, B2B corporate domains, etc.) sample powermta configuration file hot

virtual-mta pmta-vmta-pool smtp-source-host 192.168.1.10 mail.example.com smtp-source-host 192.168.1.11 mail2.example.com # DKIM for this VMTA (uncomment to override global) # domain-key default1,example.com,/etc/pmta/dkim/example.com.pem source /0 # Matches all connecting IPs always-allow-relaying

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Setting up PowerMTA is easy; getting it right is where the magic happens. If you’re seeing high bounce rates or "Connection Refused" from Gmail, your configuration is likely too aggressive.

# IP addresses and domains ip_address = "192.0.2.1" domain = "example.com" additional_domains = "subdomain.example.com, example.net"

Below is a breakdown of what a high-performance PowerMTA config file looks like and why these specific settings matter. Sample Configuration File