Postfix advice needed, setup a remote private relay
We run a small email newsletter service (3,000 subscribers strictly opt-in only, sent daily) and we're moving to an ISP that does not operate a mail relay.
I've been looking into various options and the best one for us appears to be renting a virtual private server. I have found a company and discussed this usage with them and they said it should be fine.
Basically I was looking to configure postfix as a private relay to send our newsletters through.
The server will be running CentOS 5 (I've only ever used ubuntu) and they will provide an installation of yum and webmin.
Is it possible to configure postfix as a private relay?
So we set our bulk email software (Group Mail Pro) to connect to the postfix SMTP server with a username/password, possibly with encryption as well, and send through that.
Is this possible?
Anyone have a list of postfix configuration changes I would need to make?
On our LAN we use exchange server (switching to Zimbra once v6 is out), and postfix as a local relay for our intranet DB interface with the relayhost directive.
So don't really know much about setting up access control with postfix, and getting it to send mail directly