thanks very much for your attention !
my hosting : godaddy +linux
Email address : godaddy free email ([email protected])

[form mail]: Reinstall Default Scripts Directory / Forms Email Address


settings on zencart admin as below:
sendmail method : php
smtp account : blank
smtp password: blank
smtp host : relay-hosting.secureserver.net
port:80


then test the contact us on the front platform warning :
The server encountered an internal error or misconfiguration and was unable to complete your request......................................................
Apache/1.3.33 Server at www.modelstorm.com Port 80
....................................


any body can help me ,please ! thanks thanks thanks !