utm_source (previously set to "JangoMail")
utm_medium (previously set to "Email")
utm_content (previously set to recipient's email address)
utm_campaign (previously set to campaign Subject followed by campaign ID number)
Previously, these four variables would be set for you by JangoMail, but now you can customize the values of these variables by using certain parameters. The parameters available for use are:
%%Subject%% (subject of your e-mail campaign)
%%CampaignID%% (numeric identifier for your campaign)
%%EmailAddress%% (recipient e-mail address)