Mail server and web server on different servers
I am writing a PHP application for a client who currently hosts their website on a shared domain with fasthosts.
The PHP application is going to be stored on a dedicated server at our location. Part of the PHP application is sending bulk emails, so I am going to set up a mail server on this dedicated server.
I have not done much with email servers before, so my question is this. Would using the email server on the dedicated server to send emails from their company domain, a domain which is pointed to the website on the shared fasthosts server, cause any problems? Is there anything I have to bare in mind when setting this up?
Thanks in advance.