URI segment with . in it gets converted to _

[eluser]0plus1[/eluser]
Hello hi have this issue, I call this url:

Code:

user_confirm/[email protected]

then use this:

Code:

echo $email = $this->uri->segment(3);

And it outputs:

Code:

this_is_fake@gmail_com

Why?

p.s. this is my config:

Code:

$config['permitted_uri_chars'] = 'a-z 0-9~%.:_\-@';

Thank you for your help.