On 12/17/2013 8:02 AM, Reindl Harald wrote:
there are enough writing their address uppercase while the server was never configured that way, there are enough writing [email protected] and you can hardly find a normal person who accepts that writing a message to "[email protected]" goes to a different person than "[email protected]" or bounce in one of the cases
There are also listservs and other things out there which case fold email addresses--some fold to lowercase, some to uppercase. Current best practice is treat the entire email address as case insensitive.
