RegEx as a spam filter

Hello,

I’m looking for a Regex that will catch a string with a TLD domain and that the next character isn’t an alpha character. I apologize to my law abiding Russian friends, but we’re taking extra scrutiny with emails with links to Russian sites.

Here are some examples:

  1. evil.ru
  2. http://evil.ru
  3. evil.ru{EndOfLine}

Examples not to catch:

  1. Something.running
  2. Sounds.rumble

Thanks!

So, something like this?

evil\\.ru(?!\\w)

Works like a charm. I took out the ‘evil’ part to make it more generic to any domain name. Thanks Kem!