Listeners define how PMTA accepts incoming SMTP traffic. While port 25 is the standard for server-to-server communication, port 587 is often used for client submissions.
: If sending millions of emails, use a high-performance disk (like an SSD or NVMe) or a RAM-disk to prevent I/O wait times from slowing down the injection. Exclusion from Scanning sample powermta configuration file hot
| Setting | Purpose | |---------|---------| | max-smtp-out / max-msg-rate | Controls sending speed per ISP (Hotmail, Gmail, Yahoo). | | smtp-starttls required | Forces TLS for better deliverability. | | dkim-sign yes | Adds DKIM signature to avoid spam folders. | | bounce-handler / fbl-handler | Handles bounces and abuse complaints automatically. | | dns-servers 8.8.8.8 | Fast, reliable DNS for MX lookups. | | use-rs | Enables recipient verification (RSET before DATA). | Listeners define how PMTA accepts incoming SMTP traffic
Unlike banking emails, lifestyle emails have a . A concert invite is worthless 2 hours after the show starts. We adjust the queue management accordingly. Exclusion from Scanning | Setting | Purpose |
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