If you do not use a cloud-based spam filter, you can whitelist our IP addresses in your mail server. If you use a cloud-based spam filter, you will need to whitelist by email header in your mail server and whitelist by IP address in your spam filter.
If it is not possible to whitelist IP addresses, you can whitelist our mail server domains instead.
Conduct a test campaign before your Baseline Phishing Test.
Before the baseline test, you will able to verify that our phishing emails are getting through any spam/firewall protection.