Is it possible to allow the “confirm email” field to “match” even if the case is off – for example, if some letters are capped in the confirmation or orginal, and they are lower case in the other, can it still “match”?
As per experience, Capital letter or small letter doesn’t matter. In the article of mailchimp, it says “capital letters do not affect email addresses in any way. You can capitalize the email or not capitalize any of the letters at all. As long as the email address is spelled correctly, it will work properly.”