Banned certain email addresses

[picasso]

Is there a way to prohibit certain email addresses.
Let me give you an example, I have the need for users who want to register
with the mail type 123.4567@xxxxx.xx are banned or all those addresses
that are characteristic "numbers-point-numbers@xxxx.xx"

Thanks from Picasso   

[Nibbler]

http://coppermine-gallery.com/forum/index.php?topic=16833.0