It's an interesting problem. Scam emails are a big problem, but a scammer has nothing to gain from this, so let's instead investigate on the assumption it's genuine. What you posted included both the forum name and your wife's email address (you might want to use Report when this is done to have this personal info deleted).
https://community.adobe.com/t5/user/viewprofilepage/user-id/7189238 takes us to the profile page for the forum name. This shows
- an Adobe ID was registered
- this visited the forums but have never written a message
- this happened back in 2014, nearly 7 years ago.
So I suspect your wife [or someone using her email] did visit the forum 7 years ago, did register an Adobe ID, and has forgotten all about it. I know I do this all the time. She can sign in to the account on Adobe.com if the password can be remembered. NOW, I suspect she recently viewed a forum page; perhaps it came up on a Google Search, and she skimmed quickly over it. This is enough to get one of the exciting forum badges awarded, hence the email.
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