Nathan Rixham wrote: >>> Valid email addresses according to the Multipurpose Internet Mail >>> Extension (MIME) [2]: >>> ä@example.com >>> Ã(c)@℞.com Uh, no, those aren't valid email address according to any standard. You cannot have 8bit characters to the left of the @ in the email address. The same really goes for the same on the right hand side of the @, but some people have difficulties distinguishing between the _actual_ email address and it may be rendered when the domain part is converted from punycode. The actual email address might be alfons.aaberg@xxxxxxxxxxxxxxxx which mail-agents with IDN support should display and accept like this: alfons.aaberg@ënidan.ch /Per Jessen, Zürich -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php