On Mon, Mar 31, 2008 at 02:04:29PM +0200, Alain Spineux wrote: > On Mon, Mar 31, 2008 at 5:12 AM, Gary Mills <mills@xxxxxxxxxxxxxxx> wrote: > > On Sun, Mar 30, 2008 at 02:27:29PM +0100, Alain Spineux wrote: > > > On Mon, Mar 17, 2008 at 5:39 PM, Gary Mills <mills@xxxxxxxxxxxxxxx> wrote: > > > > Once again, we had somebody use the sieve facility to redirect e-mail > > > > back to the same mailbox and then go on vacation. This sets up a > > > > forwarding loop which cyrus breaks by discarding the e-mail. During > > > > this vacation, all of the person's e-mail disappeared. > > > > > > If you force a "keep" in your sieve script, the mail will be delivered > > > at least once in > > > the mailbox > > > > It's perfectly valid to have nothing but a `forward' in a sieve > > script. People do this all the time when they don't want to keep > > a copy for themselves. Unfortunately, some also forward e-mail to > > themselves, expecting that to work. > > sieve script is only a language. > The language nor its interpreter nor its compiler dont need to be smart, because > the script writer is supposed to be smart enough. > > If the user in unable to write such script, it must use a "sieve > script manager", (application > written by a smarter developer) that will help him generating well > suited script. There's no general solution to this problem in the script language, even with a generator like we use. Again, that's because even the generator can't tell what forwarding will cause a loop. I could, for example, forward e-mail to my @fastmail.fm address, from where it would come back to me. The generator could never know about my remote forwarding. In the simplest case, writing a sieve script to forward to yourself causes the e-mail to disappear. The script writer could be considered `smart' in expecting this to work. Calling the writer `stupid' doesn't solve the problem. -- -Gary Mills- -Unix Support- -U of M Academic Computing and Networking- ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
