# ==================== # PowerMTA Sample Config (Hot / Production) # ====================
<domain *> dkim-sign yes dkim-signature dkim dkim-identity mail.your-domain.com dkim-key-file /etc/pmta/dkim/your-domain.com.pem dkim-selector your-dkim-selector dkim-headers "From:Subject:To:Date" </domain> sample powermta configuration file hot
: Keep an eye on /var/log/pmta/acct.csv . If you see a spike in 4xx error codes (temporary blocks) from Yahoo or Microsoft, you must dial back the max-smtp-out directive for that specific domain. # ==================== # PowerMTA Sample Config (Hot /
Keep your PowerMTA installation up to date to protect against known vulnerabilities and ensure you have the latest features. Limiting concurrent connections and messages per hour to
Limiting concurrent connections and messages per hour to prevent blocks.
<source 127.0.0.1> smtp-service yes always-allow-relaying yes process-x-virtual-mta yes max-message-size 0 </source>
PowerMTA (PMTA) is a highly flexible Mail Transfer Agent (MTA) designed for high-volume email delivery. The core of its functionality lies in the config file, typically located at /etc/pmta/config .