<http-user admin> password "encrypted-password-here" </http-user>
If multiple nodes must share the same spool directory (less common, but used in some active‑active designs), fast network storage (NFS with locking) or a distributed filesystem is required. Most high‑volume senders prefer independent spools per node to avoid locking contention. powermta configuration guide top
Set up a DMARC policy to tell receiving ISPs how to treat mail that fails SPF or DKIM. Start with p=none for monitoring, then move to p=quarantine or p=reject once you are confident. Start with p=none for monitoring, then move to
If you want to tailor this configuration further, let me know: What do you plan to send daily? Which ISPs make up the majority of your mailing list? Keep suppression file and import into PowerMTA suppression
Keep suppression file and import into PowerMTA suppression list.
: Control who can submit mail to your PMTA. Restrict relaying to local or specific IP addresses to prevent becoming an open relay. > always-allow-relaying yes