Hi Vinh,
Are you on CRM 2013 on Premise or CRM 2013 online? Online gives you this option to seamlessly integrate with many email marketing solution providers.
If you are on OnPremise, you can use exchange server or there are many providers out there who can help you integrate your CRM into external email marketing providers.
https://pinpoint.microsoft.com/Home/Dynamics
is a very good place to start. search for email marketing to filter results.
Regards,
Jithesh.K