On Wed, 8 Dec 2004, Gary Mills wrote:
We regularly run into this problem: A user redirects their e-mail with their sieve script to another address, but that address redirects it back to them. The result is that all e-mail sent to the user disappears without a trace. This happens because Cyrus does duplicate suppression, so that the second time around the loop, the e-mail is discarded. The same thing happens if the user just redirects the e-mail to his Cyrus mailbox.
This problem does not happen with sendmail aliases or .forward files, for example, because sendmail inserts a `Received' header each time, and detects loops by counting them. Sendmail also eliminates duplicates during alias expansion.
What can be done in Cyrus to resolve this problem? Can mail loops be handled differently than duplicate messages? Can some notification be returned to the sender? Could the loop be broken by redirecting once and delivering the second time?
I have "duplicatesuppression: no", and forwarding loops still seem to make the messages disappear. At least, the user claims that no bounce message was returned to the sender. I'm running Cyrus 2.1.16.
Just another data point.
Andy --- Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
