I agree with gp that new spam emails that override customers' email marketing preferences is not an "AI" issue.
The problem is that once companies have your email address, their irresistible compulsion to spam you is so great that they will deliberately not honor their own "Communication Preferences" that supposedly lets customers opt out of all marketing emails.
Even companies that are mostly good citizens about obeying customers' email marketing preferences still end up making exceptions. Examples:
Amazon has a profile page to opt out of all email marketing and it works... except ... it doesn't work to stop the new Amazon Pharmacy and Amazon Health marketing emails. Those emails do not have an "Unsubscribe" link and there is no extra setting in the customer profile to prevent them.
Apple doesn't send out marketing messages and obeys their customers' marketing email preferences ... except .. when you buy a new iPhone and then they send emails about "Your new iPhone lets you try Apple TV for 3 months free!" and then more emails about "You have Apple Music for 3 months free!"
Neither of those aggressive emails have anything to do with AI. Companies just like to make exceptions to their rules to spam you. The customer's email inbox is just too valuable a target for companies to ignore.
That said, I have 3 gmail.com addresses and none of them have marketing spam emails from Google about Gemini AI showing up in the Primary inbox. Maybe it's commendable that Google is showing incredible restraint so far. (Or promoting Gemini in Chrome and web apps is enough exposure for them.)