Redirecting page after sending an email through Outlook(Formula URL)

I'm trying to click a button that opens outlook to send an email and Redirect back to Quickbase but I keep getting a blank screen. Here is my formula

var text URLONE= URLRoot() & "db/" & Dbid() & "?act=API_EditRecord&rid=" & [Record ID#] &If([Checkbox]=true,"&_fid_29=0","&_fid_29=1");
var text URLTWO=URLRoot()&"db/"&[_DBID_Email]&"?a=dr&rid="&ToText([Record ID#]);
var text URLTHREE="mailto:"&URLEncode([User])
&"\n"&"?subject=Attachment"
&"&body=Hello,"&"%0A"&"%0A"&"Please see attached."
&"%0A"&"%0A"&[Link to Attachment Field]
&"%0A"&"%0A"&"Thank You";



$URLONE
&"&rdr="&URLEncode($URLTWO)
&URLEncode("&rdr="&URLEncode($URLTHREE))