React to a send
Hook into boolean_smtp_email_sent, boolean_smtp_email_delivery_failed_final and the rest of the delivery
lifecycle — no polling, no parsing logs.
Build on BooleanSMTP.
Every hook, constant, command and route BooleanSMTP exposes — generated from the plugin's own code, never hand-typed.
Start here
Section titled “Start here”Hooks133 actions and filters, generated from the plugin's docblocks — signature, parameters and a working example for each.
wp-config.php constantsCredentials per connection, the encryption key, debug switches — with a builder that writes the define() block for you.
WP-CLIwp boolean-smtp queue:work, connections:list, logs:export, test-email and import.
REST APIEvery route under booleansmtp/v1, free and Pro, with its request and response shape.
What you can build
Section titled “What you can build”Change how mail is sent
Filter the connection a message routes through, its headers, its body, or add a transport driver of your own.
Automate from the command line
Every WP-CLI command and REST route is documented from the plugin’s own argument definitions, kept in sync by a build check.
Explore visually
The Hook Explorer filters by kind, tier and area, and lights up the mail pipeline’s hooks in the order they actually fire.
Setting up the plugin itself — installing it, connecting a mailer, reading the email log? That’s docs.booleansmtp.com, the site for people running BooleanSMTP rather than building on it.