: Controls the number of connections and messages per minute to match ISP expectations. Dheera Group Sample "Hot" Configuration Snippet
# --- DKIM (Domain Keys) --- <domain-key your-domain.com_dkim> dkim-selector "selector1" # The selector for your public key's TXT record dkim-private-key-file "/etc/pmta/dkim/your-domain.com.pem" </domain-key> sample powermta configuration file hot
In 2024 and beyond, DKIM isn't optional. Ensuring dkim-sign yes is active in your config ensures that every outgoing mail is cryptographically signed, which is a primary signal for "hot" deliverability to the inbox rather than the spam folder. Best Practices Before Going "Hot" : Controls the number of connections and messages
<vmta travel-hub> max-smtp-out 50 bind-address 192.168.1.12 use-starttls yes </vmta> Best Practices Before Going "Hot" <
<vmta ent-flash> max-smtp-out 200 bind-address 192.168.1.11 throttle-smtp-out 50000 # 50k emails per hour </vmta>
To avoid being blocked by major ISPs like Gmail or Yahoo, you can set specific limits on how fast your server sends mail.