1. Click Email > Campaigns from the left-hand navigation and then click New Campaign.
2. Choose whether you want a Classic or A/B Test type of campaign, and click Next.
3. Then, click Edit Design on the envelope, choose HTML, and click Next.
4. Choose an HTML template.
5. Paste your Source Code into the HTML Code box and then click Save & Continue.
4. You will now go through the rest of a regular campaign build. You’ll pick your list, adjust your campaign settings, set your social media preferences, and schedule or send your campaign.