Description
Setting this constant before installing Gravity SMTP on a single site WP installation or before creating new sites on a multisite install will automatically pre-populate your Gravity SMTP license key for those new installations.
Usage
define( 'GRAVITYSMTP_LICENSE_KEY', 'YOUR-LICENSE-KEY-HERE' );
Placement
Constants should be set in wp-config.php.
Since
This constant was added in Gravity SMTP version 1.0