We have three dedicated servers:
- One is a Windows web hosting server
- One is a Redhat server, intended for mail
- One is a MySQL database server
On the Windows web server, we do not have the SMTP services installed. However, we have the need to send transactional (registration, email verification) emails to members.
Here are my questions:
In order to relay mail to our dedicated mail server, do we need to set SMTP up on the Windows server. We do not want the Windows server to deliver ANY email to ISP's - it should only route messages to our dedicated mail server
How do you go about setting up postfix to be ready to receive messages like these from this Windows box? There are a lot of security concerns - obviously it will not be open relay.