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action is not described

phpmailer_init action-hook . WP 2.2.0

Fires after PHPMailer is initialized.

Usage

add_action( 'phpmailer_init', 'action_function_name_9160' );
function action_function_name_9160( $phpmailer ){
	// action...
}
$phpmailer(PHPMailer)
The PHPMailer instance (passed by reference).

Where the hook is called

wp_mail()
wp-includes/pluggable.php 477
do_action_ref_array( 'phpmailer_init', array( &$phpmailer ) );

Where the hook is used (in WP core)

wp-includes/ms-default-filters.php 76
add_action( 'phpmailer_init', 'fix_phpmailer_messageid' );