I wish they’d just use clear and blunt language, rather than “strongly advise” and “to avoid.” I’m reminded of my bank sending “Important account information” mail that contains advertising OR actual important information, but at like a 20:1 ratio.
“YOUR FILES WILL BE DELETED ON {DATE}” seems like it would have solved any ambiguity.
More important than that is you have a date where you lock the data, and a date where you actually delete it, and those dates are months apart. Even if the emails are going into a black hole that shouldn't result in data loss. Don't have everything working as usual one day and gone forever the next.
To be fair I get “YOUR FILES WILL BE DELETED ON {DATE}” spam for every fay of the year, I would not be surprised legit emails are getting blocked if they contain that phrase in title - and having it in the body doesn't help either with the amount of "Important update to our terms of service" emails.
I would almost certainly delete that as spam, since I receive approximately 34987349873964 emails per minute with that exact subject, all of which are intended to do me harm
“YOUR FILES WILL BE DELETED ON {DATE}” seems like it would have solved any ambiguity.