Uh, Gmail also has usage limits for each tier. I know before I’ve painstakingly removed emails with large attachments just so I can keep receiving my email.
15gb on the free tier...empty your emails folks. This madness of keeping every email is insane. I had a user with 60000 unopened emails on one account just 2 weeks ago. It's like some folks refuse to do basic data/comms house keeping.
I have junk gmail address that gets filtered into my real gmail account (Zunk label instead of Junk) which keeps my real gmail account clean (few to handful of emails a day of things that are meaningful). Ive always have given out my junk gmail address to anyone i dont know personally or do business with.