Using civicrm 4.7.3. We have an event registration form through our civicrm installation on Wordpress 4.4.2. Registrants using this form are sent to PayPal Standard and the payment is received by PayPal but the registrant's information is not being sent back to the Civicrm database. Absolutely no information is sent back from PayPal. This worked using the PayPal sandbox but not the live site. My payment processor is set to PayPal with the correct merchant account email and the url set to https://www.paypal.com (Test payments now set to same since site is live). IPN is enabled in PayPal. My civicrm_system_log table shows the sandbox notices but nothing since I took the site live.
Help! Does anyone have an idea why this would be the case? Thank you.