Checkout Issue on Paypal: Invalid Email Address …Post author:larryPost published:Dec 20, 2005Post category:DiaryCheck access rights for the key, certificate, and those directories holding these files! Not the email address issue, but the issue is that webserver can’t access the key or cert. thus it couldn’t pass it to Paypal. You Might Also Like Grohe Bath/Shower Mixer Diverter Replacement Sep 23, 2019 Correct Pricing Tables Ready Plugin’s Currency Position Apr 7, 2014 Accident of Mother-in-law Jul 17, 2005