Don't want bogus email address inputs? At least you can validate it using Regex in Make.com. Steal this freebee!

You mainly want to use the filter. Be sure to add the lower() and trim() as diplayed in both the filter and the module receiving the email address. Don't forget to use "Text operators: Matches pattern" so make knows its Regex.

I've added some additional notes in the scenario itself.

Happy Automating!