feat: add filter:email.cancel to allow plugins to cancel sending emails

src/emailer.js

@@ -230,6 +230,16 @@ Emailer.send = async (template, uid, params) => {
 	params.uid = uid;
 	params.username = userData.username;
 	params.rtl = await translator.translate('[[language:dir]]', userSettings.userLang) === 'rtl';
+
+	const result = await Plugins.hooks.fire('filter:email.cancel', {
+		cancel: false, // set to true in plugin to cancel sending email
+		template: template,
+		params: params,
+	});
+
+	if (result.cancel) {
+		return;
+	}
 	await Emailer.sendToEmail(template, userData.email, userSettings.userLang, params);
 };