Step 1 : Login to Marketing cloud (Formerly Exact Target) account.
Step 2: Click on Email Studioà Email
Step 3: Click on Content tab on top of screen and select ‘Emails’ from the drop down.
Step 4: Click on ‘Create’ button located under ‘My Emails’ to create new email and then click on ‘HTML Paste’ from drop down.
Step 5: Enter Email Name, Email Subject, Preheader and click on ‘Save’
Step 6: Copy embed code of your timer from EmailTimers.com, paste it in the given box and click on ‘Save’.
Step 7: Click on Preview.