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 BJ Olympic 2008 Birthday Aug 8, 2008 Cannot Change Ownership on NFS Files Mar 14, 2017 PMP Can’t Play Any Download Video??? Feb 1, 2006