<source *> auto-fast-flush yes fast-flush-delay 1 # seconds fast-flush-limit 50 # messages </source>
Proper DNS and authentication are mandatory for inboxing in 2026. powermta configuration guide top
: Define the port for incoming connections, often port 25 or 587 for authenticated submission. smtp-listener 0/0:25 Use code with caution. Copied to clipboard 2. Virtual MTAs (VMTAs) and IP Pooling powermta configuration guide top
Configure dkim-body-canonization and dkim-header-canonization to simple or relaxed based on your specific needs, but ensure they match the DNS record exactly. powermta configuration guide top