We recently updated our mail server infrastructure to optimize email deliverability for our Security Awareness Training platform. We've added new IP addresses and updated our hostnames as part of this process. We strongly recommend that you review your existing whitelisting rules against our whitelisting documentation to ensure you've whitelisted all of KnowBe4's mail server IPs and/or hostnames.

View our updated IPs and hostnames here

Some of our happy campers