Multi-instance support is available with Postfix version 2.6 and later but it is introduced in Artica 1.4.022800 version.
The Multi-instance support is designed when you want to physically separate messaging by organization.
If you enable this feature, each organization manager will be able to manage it's own MTA and security.
This configuration is very flexible.
Especially when the Artica server is able to store companies which are different.
If you provide ASP/ISP services this configuration will simplify parameters.
White lists and black list are separate and a mass-mailing or a mass spam to one organization will not decrease the routing service for other organizations.
What you need ?
Artica allows you to activate multiple Postfix instances only if Postfix 2.7 is installed on your server.
To upgrade to 2.7, you just need to use "SOFTWARES INSTALL" section.
Depends of the number of organizations/SMTP domains you will be manage, a good server performance is necessary.
If you want to add filters and anti-spam features for each organizations.
In a single instance, only one Filter instance is running.
On a multiple-instance, each organization will run a separate filter instance.
You will need Public IP addresses: Each organization will run a single postfix instance with it's own IP address.
Artica helps you by managing Virtual IP for this needs.
Prepare the multi-instance.
You need to provide an IP address for each organization, this operation is managed trough the Manage Virtual IP addresses.
It is mandatory that each organization must have it's own IP address
When you have set a virtual IP for each organization, go to the "Messaging" section
- Select Routing & network tab
- Click on Postfix Network Settings icon.
- Click on multiple Postfix instances tab
- Turn to green the circle.
After several seconds, Artica will transform your server automatically on a multiple SMTP MTA servers for each organizations.
The main process will only listen the loopback address and a new instance for each organization will be launched.
If you go to an organization main area, you will see mandatory SMTP features in the "messaging" tab
