How to Whitelist in SpamAssassin
If you're utilizing SpamAssassin's spam filtering, you can whitelist KnowBe4 to allow our simulated phishing test emails and training notifications through to your end users. Although there is typically not an interface for SpamAssassin, you can edit your custom SpamAssassin config file to add a setting allowing KnowBe4's emails through based on the header of the phishing tests.
Below is the rule you'll want to add.
header KNOWBE4 X-PHISHTEST =~ /\bKnowBe4\b/i
describe KNOWBE4 Mail is from KnowBe4
score KNOWBE4 -20.0