PowerMTA handles DKIM natively—no external milter required. Generate a key pair and configure directly in the MTA.
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The global settings section is where you configure general PowerMTA settings. Here are some essential settings to configure:
Ensure your DNS records (SPF/DKIM/DMARC) are correct, then configure PowerMTA to sign every email automatically. Do not rely solely on your CMS (like WordPress or Mailwizz) to sign the mail; let the MTA handle the heavy lifting. powermta configuration guide top
Implement a DMARC record set to p=quarantine or p=reject to protect your domain from spoofing and signal to mailbox providers that you are a legitimate sender. 2. Essential PowerMTA Configuration Directives
deliver-bounces no log-bounces yes # Example rule to classify a specific bounce regex "5\.2\.2" action delete Use code with caution. B. FBL Integration
Ensure your IP addresses are not blacklisted and have Reverse DNS (rDNS) properly configured. PowerMTA handles DKIM natively—no external milter required
Create a strict SPF record ( v=spf1 ip4:YOUR_IP -all ) that authorizes only your sending IPs.
Listeners define how PowerMTA accepts email from your applications (feeders). You'll likely want a secure listener on port 587 with STARTTLS and authentication.
global max_concurrency = 50; max_messages = 500; smtp_timeout = 30; Here are some essential settings to configure: Ensure
PowerMTA is a popular email server software used by many organizations to manage their email infrastructure. It offers a robust set of features, including high-performance email delivery, advanced security, and flexible configuration options. However, configuring PowerMTA can be a daunting task, especially for those new to email server administration. In this article, we'll provide a comprehensive PowerMTA configuration guide, covering the top tips and tricks to help you get the most out of your email server.
You can then access your PowerMTA Monitor at http://your-server-ip:8080 . 7. The Golden Rules of Content and List Hygiene
# Configure the accounting file to log bounces and FBLs <acct-file /var/log/pmta/acct.csv> # Possible values: bounces, feedback, delivered, etc. record bounces,feedback max-size 100M rotate 5 </acct-file>
PowerMTA is a commercial product requiring a valid license from Port25/SparkPost. After purchasing, you will receive access to the installation package appropriate for your operating system.