diff --git a/changelog/fix-wpmail-temporary-users b/changelog/fix-wpmail-temporary-users
new file mode 100644
index 0000000000..6cf02ff4f0
--- /dev/null
+++ b/changelog/fix-wpmail-temporary-users
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Block triggering wp_mail for temporary users even on non-frontend context.
diff --git a/includes/class-sensei-guest-user.php b/includes/class-sensei-guest-user.php
index d95fae8a2c..f5b39e550b 100644
--- a/includes/class-sensei-guest-user.php
+++ b/includes/class-sensei-guest-user.php
@@ -147,7 +147,6 @@ public function init() {
 		add_action( 'sensei_can_access_course_content', [ $this, 'open_course_enable_course_access' ], 10, 2 );
 		add_action( 'sensei_can_user_manually_enrol', [ $this, 'open_course_user_can_manualy_enroll' ], 10, 2 );
 		add_filter( 'sensei_send_emails', [ $this, 'skip_sensei_email' ] );
-		add_filter( 'pre_wp_mail', [ $this, 'skip_wp_mail' ], 10, 2 );
 
 		$this->create_guest_student_role_if_not_exists();
 
@@ -307,7 +306,7 @@ private function is_course_open_access( $course_id ) {
 	 * @since 4.11.0
 	 * @access private
 	 */
-	private function is_current_user_guest() {
+	private static function is_current_user_guest() {
 		$user = wp_get_current_user();
 		return self::is_guest_user( $user );
 	}
@@ -475,7 +474,7 @@ private function is_action( $field, $nonce ) {
 	 * @return boolean Whether to send the email.
 	 */
 	public function skip_sensei_email( $send_email ) {
-		return $this->is_current_user_guest() ? false : $send_email;
+		return self::is_current_user_guest() ? false : $send_email;
 	}
 
 	/**
@@ -488,8 +487,8 @@ public function skip_sensei_email( $send_email ) {
 	 * @param array     $atts   Email attributes.
 	 * @return bool|null Null if we should send the email, a boolean if not.
 	 */
-	public function skip_wp_mail( $return, $atts ) {
-		if ( $this->is_current_user_guest() ) {
+	public static function skip_wp_mail( $return, $atts ) {
+		if ( self::is_current_user_guest() ) {
 			// If this e-mail is being dispatched while the current user is a guest, just... don't send it.
 			return false;
 		}
diff --git a/includes/class-sensei-preview-user.php b/includes/class-sensei-preview-user.php
index 26ef11620f..aa5d7ba89f 100644
--- a/includes/class-sensei-preview-user.php
+++ b/includes/class-sensei-preview-user.php
@@ -92,7 +92,6 @@ public function init() {
 		add_action( 'show_admin_bar', [ $this, 'show_admin_bar_to_preview_user' ], 90 );
 		add_action( 'admin_bar_menu', [ $this, 'add_user_switch_to_admin_bar' ], 90 );
 		add_filter( 'sensei_is_enrolled', [ $this, 'preview_user_always_enrolled' ], 90, 3 );
-		add_filter( 'pre_wp_mail', [ $this, 'skip_wp_mail' ], 10, 2 );
 
 		$this->create_role();
 	}
@@ -103,7 +102,7 @@ public function init() {
 	 * @access private
 	 */
 	public function add_preview_user_filters() {
-		if ( $this->is_preview_user_active() ) {
+		if ( self::is_preview_user_active() ) {
 			add_filter( 'map_meta_cap', [ $this, 'allow_post_preview' ], 10, 4 );
 			add_filter( 'pre_get_posts', [ $this, 'count_unpublished_lessons' ], 10 );
 			add_filter( 'sensei_notice', [ $this, 'hide_notices' ], 10, 1 );
@@ -195,7 +194,7 @@ public function add_user_switch_to_admin_bar( $wp_admin_bar ) {
 			return;
 		}
 
-		if ( $this->can_switch_to_preview_user( $course_id ) && ! $this->is_preview_user_active() ) {
+		if ( $this->can_switch_to_preview_user( $course_id ) && ! self::is_preview_user_active() ) {
 			$wp_admin_bar->add_node(
 				[
 					'id'     => self::SWITCH_ON_ACTION,
@@ -209,7 +208,7 @@ public function add_user_switch_to_admin_bar( $wp_admin_bar ) {
 			);
 		}
 
-		if ( $this->is_preview_user_active() ) {
+		if ( self::is_preview_user_active() ) {
 			$wp_admin_bar->add_node(
 				[
 					'id'     => self::SWITCH_OFF_ACTION,
@@ -236,7 +235,7 @@ public function add_user_switch_to_admin_bar( $wp_admin_bar ) {
 	 * @return bool
 	 */
 	public function show_admin_bar_to_preview_user( $show ) {
-		if ( $this->is_preview_user_active() ) {
+		if ( self::is_preview_user_active() ) {
 			return true;
 		}
 
@@ -264,8 +263,8 @@ private function can_switch_to_preview_user( $course_id ) {
 	 * @param array     $atts   Email attributes.
 	 * @return bool|null Null if we should send the email, a boolean if not.
 	 */
-	public function skip_wp_mail( $return, $atts ) {
-		if ( $this->is_preview_user_active() ) {
+	public static function skip_wp_mail( $return, $atts ) {
+		if ( self::is_preview_user_active() ) {
 			// If this e-mail is being dispatched while the current user is a previwe user, just... don't send it.
 			return false;
 		}
@@ -481,7 +480,7 @@ private function set_preview_user( $preview_user_id ) {
 	 *
 	 * @return bool
 	 */
-	private function is_preview_user_active() {
+	private static function is_preview_user_active() {
 		$user = wp_get_current_user();
 		return self::is_preview_user( $user );
 	}
diff --git a/includes/class-sensei-temporary-user.php b/includes/class-sensei-temporary-user.php
index 500689d63c..af83084082 100644
--- a/includes/class-sensei-temporary-user.php
+++ b/includes/class-sensei-temporary-user.php
@@ -35,6 +35,8 @@ public static function init() {
 		add_filter( 'sensei_learners_query', [ static::class, 'filter_learners_query' ] );
 		add_filter( 'sensei_count_statuses_args', [ static::class, 'filter_count_statuses' ] );
 		add_filter( 'sensei_check_for_activity', [ static::class, 'filter_sensei_activity' ], 10, 2 );
+		add_filter( 'pre_wp_mail', [ Sensei_Guest_User::class, 'skip_wp_mail' ], 10, 2 );
+		add_filter( 'pre_wp_mail', [ Sensei_Preview_User::class, 'skip_wp_mail' ], 10, 2 );
 	}
 
 	/**