I like to use a service like Simple Login for almost everything, you get 10 free alises you can use each as many times as you like. Thenif domething like this happens you can have them delete them so they never go into your mailbox. https://simplelogin.io/

But once they have it; “Most users are unaware that, in general, once the government lawfully collects information, under various legal doctrines they can and do use it for investigating and prosecuting crimes that have nothing to do with the original purpose of the seizure. The truth is, once the government has the information, they often use it and the law supports this all too often. Defendants in those prosecutions could challenge the use of this data outside the scope of the original warrant, but that’s often cold comfort.” From same story linked above.

I dont know how hard or how much effort it would be to used some or all of their suggestions. Maybe this instance already is?