Powermta Configuration Guide Top Better

PowerMTA Configuration Guide: Top Best Practices for Enterprise Deliverability

# Gmail Optimization max-smtp-out 20 max-msg-per-connection 100 retry-interval 10m # Yahoo / AOL (Verizon Media) Optimization max-smtp-out 10 max-msg-per-connection 50 queue-to-hold yes retry-interval 15m # Default Fallback for Unknown Domains max-smtp-out 5 max-msg-per-connection 20 retry-interval 30m Use code with caution.

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tls_cert /path/to/tls/cert tls_key /path/to/tls/key access_control allow ip 192.0.2.0/24

<domain yourdomain.com> dkim-sign yes dkim-signature-header i=@yourdomain.com; dkim-private-key-file /etc/pmta/dkim/yourdomain.com/private.key dkim-selector pmta2022 </domain> _dmarc

PowerMTA will now sign all outgoing mail for yourdomain.com . You can allow sending applications to override or specify DKIM options by using a special X-DKIM-Options header and enabling the process-X-DKIM-Options directive in your source block.

_dmarc.example.com. TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc@example.com" _dmarc.example.com. TXT "v=DMARC1

<domain outlook.com> max-smtp-out 15 max-message-rate 800/h vmta "marketing" </domain>

pmta show queues : Identifies which domains are backing up or experiencing errors.