What it IP authorization?
This application allows to restrict access to SMTP server for one IP address or a group of servers. Such solution increases message send out safety, as even in a situation where your SMTP server password leaks out establishing connection with it will only be possible from predefined servers.
How to set up IP authorization?
In “IP authorization” application a “Turned on” option must be ticked. In the next step an IP address or a range of IP addresses must be added. Lastly in “Restrict access to SMTP for IP:” section a “Yes” box must be ticked.