Checks whether the domain in the email_address
requires conversion to ASCII and if it does it also converts it.
When the do_format
is true, the output string is formatted for display, otherwise it's
encoded for use in the message headers. A null is returned when no conversion was needed.
email_address |
an email address as string |
do_format |
what format will be returned |
the See: hostname_utils_requires_ascii, sanitize_ascii_domain, utils_sanitize_ascii_domain_in_url_str |