I am usuing XOOPS 2.3.0.

I cannot receive mail notification by email.
And for all the contact modules, I am not able to send email too.
After I hit enter, it just go back to the same contact form.

I tried both sendmail and php mail(), both don't work.

So I tried going to Admin Area and use the function Mail Users, I send it to Webmaster (which is myself), and I am able to receive it!!!

So what is the problem here?

Please help.

Thank you.