Firewall configuration / TEST TOOL

To prevent spam and viruses from bypassing the Spam-Filter, it's recommended (but not mandatory) to lock down the firewall of your mailserver. This means limiting SMTP (PORT:25) traffic at the firewall level to only allow connections from Spam-Filter.com IP addresses.

Spam-Filter.com utilizes three (3) data centers:

209.213.83.0/24
74.118.76.0/24
50.202.38.0/24

After making the restrictions to port:25, you can use this tool to test your configuration. If successful, you should receive three (3) emails, one from each data center.


*Must be an address that is currently being protected by spam-filter.com

Spam Filter