I think I just discovered how to whitelist a whole domain in Gmail. I’ve been having issues with emails from my online school getting flagged as spam. Luckily they all come from the same domain, but I couldn’t find a way to whitelist a whole domain.

According to the Gmail Help topic:

How do I prevent mail from being marked as spam?
Make sure you’ve added your friends’ email addresses to your Contacts list. Gmail always delivers messages from your contacts.

From this I gathered that I could add each as an individual, but as different people from financial aid, new instructors, announcements, etc contact me, they’d be coming from different addresses. Just on a whim I added a wildcard address to my contact list.

Once I added a *@domain.com entry to my contact list, all my emails from the various people showed up in the “Recent conversations” section for that contact. Unfortunately I can’t confirm this until I receive some more emails from them. So far it seems to have accomplished what I want. Please try it out and leave comments if it works or not.