I'm still have another problem, and can't open his site to my customer :(
First, everything's OK with my php.ini, my smtp server, etc... (it works sending mail with mail() function )
The problem is that no mail are sent via YOUR form, and i know why...
Your contact form is not compatible when permalinks are not set by default !
If we use the personalized structure offered by WordPress, to try to have a good SEO, then your form doesn't send mail, (and doesn't display an error message, which should be a minimum... ;) )
So... Can you fix it ?... or do your templates only run with the default structure ( mydomain.com/?p=123 ) which means to be able to participate to the "Be in the latest pages of the Serps" contest ?