How to use PHP Mail function or sendmail to send and/or receive emails from my live site I am hosting my site on OVH and they have told me that sending emails using external SMTP servers is not allowed. I need to use the PHP Mail function or sendmail. I have a Drupal 7 installation and I am completely lost.


Which of these is the best option?
What steps do I need to follow in order to use one of these options? 


My site is currently live and I am not able to receive emails through my contact form.

Thanks in advance.
Based on the comments above:

Since your server does not permit direct SMTP communication, and since SMTP Authentication Support specifically overrides the default behaviour "This module allows Drupal to bypass the PHP mail() function and send email directly to an SMTP server."

I would suggest disabling the two modules, SMTP Authentication support and PHPMailer, and use the default drupal mailer which by default uses php mail() as permitted by the server.