Rocket.Chat.ReactNative/app/lib/methods/helpers/isValidEmail.ts

export function isValidEmail(email: string): boolean {
	/* eslint-disable no-useless-escape */
	const reg =
		/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
	return reg.test(email);
}