Blocking IP on external firewall

[PPCM]

For Blocking IP, it could nice to interface Stalwart and an external firwal. In that way, malicious requets will not affect Stalwart Server

In my case, I use pfSense, and it can by setup by API. Need a real interface between pfSense and Stalwart-mail
Or the package pfBlockerNG can by used with block IPv4 feeds (the easest way). A file with the list of blocked IPs can be used by other systems

What do you think about that?

[mdecimus]

If the file with blocked IPs is available from an HTTP or local resource, then you can use it from Stalwart as an HTTP lookup list.