Create account at cloudflare.com 

Click Add Site in your account.

Then, go to DNS settings to set up a domain.

You must add new DNS records related to Elastic Email (you don't have to add them if you already have them present):

Go to Page Rules settings to set up Full tracking SSL for your domain:

Add domain [example: tracking.yourdomain.com/*] and select SSL Full:

Login to your domain admin panel and go to DNS settings. Set DNS to cloudflare.com servers as follows:

carl.ns.cloudflare.com

chin.ns.cloudflare.com

You may need to wait up to 72 hours for DNS changes to take effect.