Set up a custom email address for free

If you have a website with a custom domain you can start sending and receiving email using a custom address like you@yourdomain.com.

Set up an account with mailgun, configure your DNS records and you're ready to send mail using your favorite App through SMTP or using Curl, Ruby, Python, PHP, Java or C# through their API. Check mailgun documentation to find out more.
Configuring DNS records for the first time may be tricky. You can't just copy everything mailgun provides you with as is and paste it into your DNS record config page. Due to a lack of experience I had to make some adjustments before my domain got verified.

If you're using namecheap here's how your settings in All Host Records should look like(note the use of the @ simbol):