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About the second commit, I've just realized that the function calls normalize_and_hash which already does the strip. However I think that we should keep this extra strip in the very beginning of the function so a string like "[email protected] " (with a trailing whitespace) works.
If we don't perfom this previous strip, the regex won't match, and the period won't be removed.

Question - are these changes just to address email address that don't have @ symbols in them?

@BenRKarl
Yes.

The original function already tries to do so, but in a wrong way:

    email_parts = normalized_email.split("@")
    is_gmail = re.match(r"^(gmail|googlemail)\.com$", email_parts[1])

    # Check that there are at least two segments and the second segment
    # matches the above regex expression validating the email domain name.
    if len(email_parts) > 1 and is_gmail:

I've just moved the is_gmail regex inside the if so it's only calculated if there are at least two segments.

    email_parts = normalized_email.split("@")

    # Check that there are at least two segments
    if len(email_parts) > 1:
        # Checks whether the domain of the email address is either "gmail.com"
        # or "googlemail.com". If this regex does not match then this statement
        # will evaluate to None.
        if re.match(r"^(gmail|googlemail)\.com$", email_parts[1]):

@arnau126 ok great, sorry for the delay. Looks like these changes are being added to now-deleted files. Could you move them over to the new files where this validation occurs?

remarketing/upload_enhanced_conversions_for_leads.py
remarketing/upload_enhanced_conversions_for_web.py

@BenRKarl
Done (and rebased).