Click Create New Campaign under the Campaigns section of your account:
Then choose the Already Have HTML option on the bottom of the “Choose Template Type” page if you’re using our original editor:
If you’re using our newer editor, this is what you’ll see – you will choose the Import HTML option:
On the next page, paste your Source code into the box and then click Next Step:
You will now go through the remainder of a regular campaign build. You’ll pick your list, adjust your campaign settings, set your social media preferences, and schedule or send out your campaign.