BorderWare Security Network (BSN) reports that email traffic from individual organizations has over 80% of their sent mail sent from IP addresses outside of their domain. This means that legitimate organizations are being incorrectly being labeled as spammers causing emails to be blocked unbeknownst to them. BSN also features a Global Threat Map and a Threat Dashboard that shows where the worst threats are coming from and features top 10 lists including the worst offenders and top spammers. The BSN Portal tracks domain reputation in real time. Want to check your reputation? Enter your domain (ex. xxx.com) in the upper right corner of the screen.”]
Source: https://www.darkreading.com/attacks-breaches/80-of-companies-unknowingly-send-spam