The external redirect thing that was added ages ago was supposed to have a warning screen for regular links but not for emails, but someone fucked up and it's the exact opposite.
Fix plz
I don't really get what you mean. Has it already been fixed? If not let me know what exactly needs to be changed and I'll bring it to Sythe's attention.
If someone puts an e-mail address as a "mailto:[email protected]" link it should be ignored by the external redirect. If they just do [url][email protected][/url] it may not get a mailto: and may get caught by the redirect. This simply has to do with how the user embeds the email I think, not the redirection script.