Powermta: 60r3 Install

Allow inbound injection (usually from localhost or a trusted web server) and outbound SMTP:

From: test@yourdomain.com To: your-real-email@gmail.com Subject: PMTA 6.0r3 Test This is a test from PowerMTA.

Then create /etc/pmta/auth.txt with user:password pairs. PowerMTA can sign emails on the fly. Generate a DKIM key and add to config: powermta 60r3 install

firewall-cmd --permanent --add-port=25/tcp firewall-cmd --permanent --add-port=587/tcp # For submission firewall-cmd --reload | Problem | Likely Cause | Solution | |---------|--------------|----------| | Cannot open license.db | File permissions | chown pmta:pmta /etc/pmta/license.db | | High memory usage | Too many max-queue-size or processes | Reduce values; monitor with free -h | | Bounce processing not working | No bounce mailbox configured | Set bounce-handler and run pmta handle-bounces | | Slow delivery to Gmail/AOL | Throttling too aggressive | Increase throttle-ip to 500–1000 for good IPs | | Config changes not applying | Forgot to reload | systemctl reload pmta (graceful) | Final Thoughts: Beyond Installation Installing PowerMTA 6.0r3 is only the first 20% of the journey. The remaining 80% involves IP warmup, feedback loop setup (FBLs), list hygiene, and ESP monitoring. Treat this installation as your foundation.

/usr/sbin/pmta show queue /usr/sbin/pmta show stats If the email arrives, congratulations – PowerMTA 6.0r3 is fully functional. A raw installation is not production-ready. Apply these critical adjustments: 1. Secure the Injection Port By default, any local user can inject mail. Restrict injection to specific users or require auth. Add to source block: Allow inbound injection (usually from localhost or a

dnf install -y wget curl tar gzip make gcc libtool pcre-devel zlib-devel openssl-devel Note: 64-bit systems are mandatory; 32-bit is not supported. PowerMTA can run with SELinux enforcing, but it requires custom policies. To avoid initial delivery issues, set SELinux to permissive mode:

virtual-mta marketing smtp-source-host 192.168.1.101 dns-domain "marketing.yourdomain.com" helo-name "marketing.yourdomain.com" Generate a DKIM key and add to config:

Remember that while 6.0r3 is robust, it lacks some modern features (like HTTP API injection and 7-bit SMTPUTF8 support) found in version 7+. However, for raw throughput and stability, especially on older kernels, 6.0r3 remains a battle-tested workhorse.