We currently have
blocked email domains
I guess we could add:
blocked email patterns
Getting the regex right though is somewhat annoying given all the escaping needed. I worry about giving options like this, cause the odds of people getting the regex right and as intended are quite low. They need to remember to escape bot dots and pluses.
.*\+.*@gmail\.com
We could I guess do a non regex based simplified pattern that just expands * and ?.
*+*@gmail.com