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Powermta Config File Link < 2025 >

To master PowerMTA, adopt these four golden rules regarding configuration links:

When you finally open the correct config file, here is what the "linked" structure looks like:

# /etc/pmta/config

/etc/pmta/config



File: /etc/pmta/00-base.conf


smtp-service 25
  max-message-size 10M
  max-recipients-per-message 100
end



File: /etc/pmta/overrides-large.conf


smtp-service 25
  max-message-size 25M     # Overrides the 10M from base
end



If the main config includes base first, then overrides, the effective limit becomes 25M. powermta config file link


domain gmail.com 
vmta "gmail-vip"
# Link 5: Link to a throttling policy
throttle *mail-gw.google.com 50

If any of these links break (e.g., IP 203.0.113.5 is no longer assigned to your server), PowerMTA will log a source-not-available error and refuse to send mail for that domain.