Even if the file extension is .txt , you can include "metadata" like names. Use a comma or a tab to separate the fields.
To ensure your file is "full feature" and ready for any professional platform, follow these layout rules:
valid = [] invalid = [] for email in non_empty: if re.match(email_regex, email): valid.append(email.lower()) else: invalid.append(email)
A TXT file itself isn’t illegal, but how you obtained and used the emails is. email list txt file
