diff --git a/packages/js/email-editor/src/store/selectors.ts b/packages/js/email-editor/src/store/selectors.ts
index 641b9589e4..bdab5aee5a 100644
--- a/packages/js/email-editor/src/store/selectors.ts
+++ b/packages/js/email-editor/src/store/selectors.ts
@@ -248,10 +248,9 @@ export const getEmailTemplates = createRegistrySelector(
 			} )
 			// We still need to filter the templates because, in some cases, the API also returns custom templates
 			// ignoring the post_type filter in the query
-			?.filter(
-				( template ) =>
-					// @ts-expect-error Missing property in type
-					template.plugin === 'mailpoet'
+			?.filter( ( template ) =>
+				// @ts-expect-error Missing property in type
+				template.post_types.includes( 'mailpoet_email' )
 			)
 );
 
diff --git a/packages/php/email-editor/src/Engine/Templates/class-templates.php b/packages/php/email-editor/src/Engine/Templates/class-templates.php
index a9bb34112d..24e217628d 100644
--- a/packages/php/email-editor/src/Engine/Templates/class-templates.php
+++ b/packages/php/email-editor/src/Engine/Templates/class-templates.php
@@ -8,6 +8,7 @@
 declare(strict_types = 1);
 namespace MailPoet\EmailEditor\Engine\Templates;
 
+use MailPoet\EmailEditor\Validator\Builder;
 use WP_Block_Template;
 
 /**
@@ -44,6 +45,7 @@ class Templates {
 	 */
 	public function initialize(): void {
 		$this->register_templates();
+		$this->register_post_types_to_api();
 	}
 
 	/**
@@ -86,4 +88,41 @@ class Templates {
 			);
 		}
 	}
+
+	/**
+	 * Register post_types property to the templates rest api response.
+	 *
+	 * There is a PR that adds the property into the core https://github.com/WordPress/wordpress-develop/pull/7530
+	 * Until it is merged, we need to add it manually.
+	 */
+	public function register_post_types_to_api(): void {
+		$controller = new \WP_REST_Templates_Controller( 'wp_template' );
+		$schema     = $controller->get_item_schema();
+		// Future compatibility check if the post_types property is already registered.
+		if ( isset( $schema['properties']['post_types'] ) ) {
+			return;
+		}
+		register_rest_field(
+			'wp_template',
+			'post_types',
+			array(
+				'get_callback'    => array( $this, 'get_post_types' ),
+				'update_callback' => null,
+				'schema'          => Builder::string()->to_array(),
+			)
+		);
+	}
+
+	/**
+	 * This is a callback function for adding post_types property to templates rest api response.
+	 *
+	 * @param array $response_object The rest API response object.
+	 * @return array
+	 */
+	public function get_post_types( $response_object ): array {
+		if ( isset( $response_object['plugin'] ) && $response_object['plugin'] !== $this->template_prefix ) {
+			return array();
+		}
+		return array( $this->post_type );
+	}
 }