Rules are useful to manage incoming mails, but not for already existing mails in the mailbox. Therefore I would like to have the ability to use rules for already existing mails.
I think we are better off with detailed documentation on how rules work and are structured ... and a sample on how to trigger them. Now that would be best
@3 I could image to trigger one or more rules by a "rules manager". In this "rules manager" i would have the ability to enable rules to manage all mails within one or more selected folders.
Another approach could be to select a single rule and then apply it to a selected view/folder. This functionality is offered by Netscape (yes, I know: it is ancient, but I still use it because there are hardly any virusses written for Netscape mail).
When I have to deal with end-users (and support personnel) who've come from Outlook to Notes, it's pretty high on the list of annoyances that they can't retrospectively apply a rule to their emails (Yes, I know Notes is a lot more than just email, but to most newbie end-users, email's the first thing they encounter).
In fact, come to think of it, most other email clients I have used have this option, except Notes - Thunderbird and Googlemail (filters), Mac Mail, Outlook (Full & Express), Eudora. I think even cc:mail had this option, although it's been a while so I wouldn't put money on it.
It surely wouldn't be that difficult, after all, it's possible to run Agents against existing documents, you just wouldn't want most end-users writing Agents in their email, due to the high level of damage that could ensue.