Try the following : <a href="mailto:test@gmail.com&subject=test" onClick="var s=s_gi('wfbmobileappdev'); s.linkTrackVars='contextData.wfi.shareType,contextData.wfi.shareEvent'; s.contextData['wfi.shareType'] = 'Test'; s.contextData['wfi.shareEvent'] = '1'; s.tl(this,'o','Sharing Action',null,'naviga...