QUOTE(StevenUnderwood @ Apr 3 2004, 10:07 PM)
1. Filters are only run when you are logged into the webmail application. If you are forwarding or popping the messages from the spamcop servers, they will not be used.
2. Wazoo may be correct, but it would seem that the rule:
Self-defined header: Return-Path: contains <> Deliver to mailbox: Trash
could work. I know that the filter is allowed to be created. Whether it works or not is something that needs to be tested and minor changes might need to be made. For instance, does the self-defned header need a colon after it or do the brackets need a space between them.
I just tried this filter on 535 messages in my trash bucket and got no hits. Not sure if I have any messages with <> Return-Path however.
Just to update this thread...
Self-defined header: Return-Path: contains <> Deliver to mailbox: Trash
filter does indeed work with no space between the brackets. If you have filters set to run at login, the mailbox could be cleaned as automatically as possible.