Checkout Issue on Paypal: Invalid Email Address … Post author:larry Post published:Dec 20, 2005 Post category:Diary Check 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 ABC’s of Life May 31, 2005 人神共憤,天地不容 Aug 26, 2005 WordPress qTranslate Home URL Issue Mar 31, 2014