All CAC users have a link on their computer’s desktop called “Comodo Antispam Gateway”. That website link points to the following.

https://domeasmsp.cdome.net/

Open this website link and login using your credentials.

You can then blacklist/whitelist/quarantine any emails that have been sent to your account.

If you have whitelisted any emails (or email domains), please submit an I.T. helpdesk ticket asking the I.T. staff to release this whitelisted email(s).