I tried using this with COnfigure_SMTP plugin. When I send a test message form the plugin it comes thorugh fine. When a message is sent via the contact form it goes into SENT items on GMAIL and does not show the actual sender's address for me to even reply too. If I point the SMTP plugin to another server it works fine.
It also shows "On Behalf of" but still with no proper sender address.
Why will the contact form not send properly using GMAIL but the SMTP test message is fine? Is this an SMTP plugin issue or contact form issue?