If a post includes a URL fragment — e.g. "/forumpost/1234abcd" — the email message builder should try to work out the full URL that the browser would generate when you click that link in the web UI, so that such links are valid in email messages as well.

This is low priority, as far as I'm concerned. I just wanted to get it out there while I was thinking about it.

It's probably also somewhat difficult to do, because it would mean the email code has to know enough about each markup language available in Fossil that it can find the URLs and accurately replace them inline.