I'm currently experimenting with working with Outlook.com for an email server, and have MX records set up to point there and the like. How can I configure systems like postfix to use external servers for mail? When I try to use functions like PHP's mail() for example, the server logs return this line, obviously because user isn't a user on my system, but rather is on an external mail server.

ABBAB100B92: to=<[email protected]>, relay=local, delay=0.06, delays=0.04/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user: "user")

Might it be easier to run a mail server right off of the VPS I'm hosting my website on, so that everything stays local? Or is that not a very good idea?

System is an Ubuntu 12.04.3 LTS

Thanks!

I'm currently experimenting with working with Outlook.com for an email server, and have MX records set up to point there and the like. How can I configure systems like postfix to use external servers for mail? When I try to use functions like PHP's mail() for example, the server logs return this line, obviously because user isn't a user on my system, but rather is on an external mail server.

ABBAB100B92: to=<[email protected]>, relay=local, delay=0.06, delays=0.04/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user: "user")

Might it be easier to run a mail server right off of the VPS I'm hosting my website on, so that everything stays local? Or is that not a very good idea?

System is an Ubuntu 12.04.3 LTS