This article explains how to configure MailEnable to only accept inbound mail from authenticated connections. This can be configured as a global server policy or as a postoffice level policy. A scenario where inbound authentication policy is applicable, is if you require MailEnable to only accept connections from an external spam gateway or proxy and reject any direct inbound traffic from other sources. This ensures that only connections that have authenticated can send to (or relay through) the server or postoffice.
Configuring the inbound authentication option as a global server policy:
Note: Please consult within your spam gateway/proxy documentation on how to configure the service to authenticate.
Configuring the inbound authentication option as a postoffice level policy:
In order for the spam gateway/proxy to relay messages via the MailEnable server it is necessary to add the IP address of the spam gateway/proxy server to the MailEnable SMTP relay option for "Allow relay for privileged IP ranges". Please see: http://www.mailenable.com/documentation/10.0/Enterprise/SMTP_props_-_Relay.html
The above policies will only prevent inbound connections from being able to send to the server or domain. Connections from spammers and other foreign locations will still occur. Therefore, to help stop the unwanted connections from being to abuse the server the "Abuse detection and Prevention" option can be enabled under the "localhost" properties within the "Policies" tab. For more information about the abuse policy please see: http://www.mailenable.com/documentation/10.0/Enterprise/Localhost_-_Policies.html
Along with the "Abuse detection and prevention" option you can further restrict and tighten up security to restrict authentication attempts to specific countries. The connecting IP address is checked against a country database and will either be blocked or allowed to perform a login attempt. This can also be set as a global server policy or as a postoffice level policy. Please see:
|Product:||MailEnable (ME-Any Pro-Any Ent-Any)|
|Class:||HOWTO: Product Instructions|
|Revised:||Tuesday, March 13, 2018|