Microsoft Outlook displays ticket notification mails in a non-monospace font, how do I change that?
Outlook can be configured to use a monospace font by going to Tools -> Options… -> Email format -> Fonts … -> International Fonts. Highlight Unicode in the language list, select Courier New as the proportional font, and select Unicode (UTF-8) as encoding. Or try http://outlooktrac.googlepages.com/ – utility to sync trac tickets with outlook.