feat: email styles

src/Mailer.php

@@ -131,16 +131,19 @@ class Mailer {
                 continue;
             }
             if ( $email->get_is_enable() ) {
+                $mailer_from = $this->get_from();
                 add_filter(
                     'wp_mail_from',
-                    $from_cb = static function ( $from ) {
-                        return $this->get_from();
+                    $from_cb = static function ( $from ) use ( $mailer_from ) {
+                        return $mailer_from;
                     }
                 );
+
+                $mailer_from_name = $this->get_from_name();
                 add_filter(
                     'wp_mail_from_name',
-                    $from_name_cb = static function ( $from_name ) {
-                        return $this->get_from_name();
+                    $from_name_cb = static function ( $from_name ) use ( $mailer_from_name ) {
+                        return $mailer_from_name;
                     }
                 );
                 add_action( 'wp_mail_failed', [ $this, 'catch_error' ] );