smtp-source-host 1.2.3.4 # Your dedicated IP host-name ://example.com Use code with caution. Copied to clipboard By grouping these into a
Organize your sending IPs into to separate traffic types (e.g., transactional vs. marketing). powermta configuration guide top
Avoid using URL shorteners, excessive images, or spam-trigger words (e.g., "FREE", "WIN", "LIMITED OFFER") in your subject lines and HTML bodies. smtp-source-host 1
<dkim mydkim> sign yes selector pmta2024 domain senderdomain.com key-file /etc/pmta/dkim/private.key canonicalization relaxed/simple sign-headers From:Date:Subject:To:Message-ID </dkim> You should create different VMTAs for different traffic
<domain *> max-msg-rate 200/h max-smtp-out 5 use-starttls yes </domain>
You can define a "cold" VMTA to send low volumes of email to a new IP, and then set max-cold-virtual-mta-msg to have PowerMTA automatically increase the daily volume over a defined period.
A VMTA is a logical entity that groups one or more sending IPs together with a specific sending behavior. You should create different VMTAs for different traffic types (e.g., transactional vs. marketing emails) or for different clients if you run a multi-tenant platform.