I am using a very simplified version of the IPN that works fine in sandbox mode but does not fire off the email when I send it live. Any ideas what I am doing wrong? test.cfm <form action="https://www.paypal.com/cgi-bin/webscr" method="post"> <input type="hidden" name="cmd" value="_xclick"> <input type="hidden" name="business" value="john@thescibonas.org"> <input type="hidden" name="item_name" value="Test Number 2"> <input type="hidden" name="item_number" value="1234"> <input type="hidden" name="amount" value="0.01"> <input type="hidden" name="no_shipping" value="1"> <input type="hidden" name="return" value="http://www.thescibonas.org"> <input type="hidden" name="cancel_return" value="http://http://www.thescibonas.org"> <input type="hidden" name="no_note" value="1"> <input type="hidden" name="currency_code" value="USD"> <input type="hidden" name="lc" value="US"> <input type="image" src="https://www.paypal.com/en_US/i/btn/x-click-but23.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!"> </form> ipn.cfm <!-- read post from PayPal system and add 'cmd' --> <CFSET str="cmd=_notify-validate"> <CFLOOP INDEX="TheField" list="#Form.FieldNames#"> <CFSET str = str & "#LCase(TheField)#=#URLEncodedFormat(Evaluate(TheField))#"> </CFLOOP> <CFIF IsDefined("FORM.payment_date")> <CFSET str = str & "&payment_date=#URLEncodedFormat(Form.payment_date)#"> </CFIF> <CFIF IsDefined("FORM.subscr_date")> <CFSET str = str & "&subscr_date=#URLEncodedFormat(Form.subscr_date)#"> </CFIF> <!-- post back to PayPal system to validate --> <CFHTTP URL="https://www.paypal.com/cgi-bin/webscr?#str#" METHOD="GET" RESOLVEURL="false"> </CFHTTP> <!-- check notification validation --> <CFIF #CFHTTP.FileContent# is "VERIFIED"> <!-- check that payment_status=Completed --> <cfif FORM.payment_status eq "Completed"> <!-- check that receiver_email is your email address --> <cfif #FORM.RECEIVER_EMAIL# eq "john@thescibonas.org"> <!-- process payment --> <!--- send user an email ---> <cfmail server="scriptmail.intermedia.net" from="john@thescibonas.org" to="#FORM.payer_email#" subject="Test Subject"> Test Message </cfmail> </cfif> </cfif> </CFIF>