How to setup SMTP Server, Ubuntu, ISPCONFIG 3

[Barryvdw]

Hey people.

I have managed to setup a complete linuw box with ISPCONFIG, and everything is working 100% (Not bad for a Microsoft Engineer)

I would now like ot find out how to setup the same server to be used as a smtp server.

I am running a offsite DNS server that just points all relevant records to the relevant servers.

My clients have different domains so at this stage all there incomming mail services are setup acorrding to there domain names eg: mail@mydomain.com

I would like for them to autehnticate against "there own" smtp server: smtp@mydomain.com, for each customer.

So customer A would be: smtp@domain1.com
Customer B: smtp@domain2.com

I do however need all this to run on the single Linux box.

Also how will my DNS server entries look to establish this.

Kind Regards from South Africa

Barry