Sample Powermta Configuration File Hot Here

Always reload PowerMTA after adjusting limits:

tls-enabled yes tls-listener-port 465 tls-certificate /etc/pmta/ssl/mail1.example.com.crt tls-key /etc/pmta/ssl/mail1.example.com.key tls-ca-cert /etc/ssl/certs/ca-bundle.crt tls-protocols TLSv1.2,TLSv1.3 tls-ciphers HIGH:!aNULL:!MD5

DMARC policies are also DNS TXT records. PowerMTA supports reporting via the Feedback Loop (FBL) processor for spam complaint tracking:

# Pool C: dedicated transactional IPs <pool name="txn"> ips 203.0.113.30 max-msg-rate 2000/hour max-conn-per-ip 100 concurrency 20 reputation-weight 1.0 </pool> sample powermta configuration file hot

# Multi-VMTA hot configuration example virtual-mta pmta-newsletter-pool smtp-source-host 192.168.1.10 newsletter1.example.com smtp-source-host 192.168.1.11 newsletter2.example.com max-smtp-msg-rate 10000/h

# ========================================================== # PowerMTA Configuration File - High Performance (Hot) # ========================================================== # 1. Server Basics # ---------------------------------------------------------- http-mgmt-port 8080 http-mgmt-host 0.0.0.0 http-mgmt-password your_strong_password license-key xxxxx-xxxxx-xxxxx-xxxxx hostname ://example.com smtp-source-host 192.0.2.1 ://example.com # Primary IP # 2. IP Address & Traffic Management # ---------------------------------------------------------- # Define your IPs here for virtual MTA usage smtp-source-host 192.0.2.2 ://example.com smtp-source-host 192.0.2.3 ://example.com smtp-source-host 192.0.2.4 ://example.com # Create Virtual MTAs (VMTA) for sending smtp-source-host 192.0.2.2 ://example.com smtp-source-host 192.0.2.3 ://example.com smtp-source-host 192.0.2.4 ://example.com # Group VMTAs for load balancing virtual-mta vmta1 virtual-mta vmta2 virtual-mta vmta3 # 3. Performance & Queue Optimization # ---------------------------------------------------------- max-smtp-out-connections 10000 max-smtp-out-msg-rate 5000/h # Increase memory for heavy load max-queue-memory 512M # Spool directory spool-dir /var/spool/pmta # 4. Delivery Rules (The "Hot" Settings) # ---------------------------------------------------------- # Default behavior max-smtp-out-connections 20 max-smtp-out-msg-rate 100/m max-messages-per-connection 100 # Optimized rules for high-volume receivers (Gmail, Yahoo, etc.) max-smtp-out-connections 50 max-smtp-out-msg-rate 2000/m max-messages-per-connection 200 retry-after 10m max-smtp-out-connections 40 max-smtp-out-msg-rate 1500/m max-messages-per-connection 200 # 5. DKIM Signing (Essential for Deliverability) # ---------------------------------------------------------- domain example.com key-file /etc/pmta/dkim.pem selector default # 6. Logging & Monitoring # ---------------------------------------------------------- log-file /var/log/pmta/pmta.log log-rotate 10 100M # Enable delivery logs for analytics acct-file /var/log/pmta/acct.csv acct-file-rotate 10 100M Use code with caution. Detailed Breakdown of Key Settings 1. Virtual MTAs ( )

postmaster postmaster@example.com host-name mailer.example.com log-level 2 max-smtp-out 5000 sample powermta configuration file hot

Here is a complete example configuration—all real IPs and domains have been replaced with placeholders, making it ready for adaptation:

-- start of file --

cp /etc/pmta/pmta.conf /etc/pmta/pmta.conf.bak sample powermta configuration file hot

: Reduces latency by sending multiple emails per connection.

Use the http-mgmt interface to track drop rates and spool size.

acct-file /var/log/pmta/acct.csv record b,r move-interval 5m delete-after 30d record-fields time,tstamp,dsn,envFrom,envTo,reason,vmta,ip,sender,rcpt,size,status