In PowerMTA (PMTA), a "hot" configuration generally refers to high-volume or "aggressive" delivery settings, often used for warming up IPs or sending to high-reputation recipients. This configuration is typically managed within the /etc/pmta/config Sample High-Volume (Hot) Config Review A robust PowerMTA configuration uses
vmta main-sender auto-warmup true pool pool-high-volume dkim-signature "main" # See DKIM section below always-allow-vmta-domain true max-smtp-out 200 queue-type shared sample powermta configuration file hot
A "hot" config generally means reducing delays, enabling aggressive parallel connections, using multiple IP addresses (rotation), and minimizing internal logging overhead to maximize outbound throughput. ⚠️ Warning: Before You Use This In PowerMTA (PMTA), a "hot" configuration generally refers
Not all ISPs have the same rules. Gmail is generally more receptive to high volume if your DKIM and SPF are perfect, while Microsoft (Outlook/Hotmail) is notoriously strict. Using tags allows you to throttle speeds for sensitive receivers while letting "hot" traffic fly through more lenient ones. 4. DKIM Signing Gmail is generally more receptive to high volume
virtual-mta vmta-ip-2 smtp-source-host 192.168.1.102 mail2.yourdomain.com domain-key big-signer,,$domain,/etc/pmta/dkim.key
<!-- FEEDBACK LOOPS (Reputation Management) --> <fbl-account your-fbl-key> <feedback-loop> domain hotmail.com domain yahoo.com process-bounces yes remove-headers yes </feedback-loop> </fbl-account>