no dns and no mail server

Hi everybody,

I would like to ask a question, I hope it isn't a faq.

I have no need of dns server and mail server because these services are provided where I bought the domains.

So I need only a tool to manage apache virtual host and isolate ftp for each user.

I need also a way to configure an external smtp server which I can use from sendmail php command.

Can Sentora handle this?
I seen that I can disable dns server but it's safe?
And how I can setup the external smtp?
 
Best regards and thanks,
Claudio