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Normalize mail solution in Clear category for Unique Email Addresses by U.V
def normalize_mail(mail):
n, u = mail.lower().split('@', maxsplit=1)
if '+' in n: n = n.split('+')[0]
return n.replace('.', '') + '@' + u
unique_emails = lambda emails: len(set(normalize_mail(nm) for nm in emails))
Jan. 4, 2023