I am having this problem and am unable to figure it out. I've read what others have done to resolve this but nothing is working for me.
Here is the error: postfix# dspam --class=spam --user global --source=error < CC748F22DBDB1BE8B20421500614254261755A4.MSG ' failed07/03/2007 11:26:38] Signature retrieval for '1,468a5cac411742047920731 47842: [07/03/2007 11:26:38] Unable to find a valid signature. Aborting. 47842: [07/03/2007 11:26:38] process_message returned error -5. dropping message. I have dspam setup to use one shared group for everything: global:shared:*dspam That signature does exist in mysql and global has a UID of 1. I've tried turning the ParseToHeaders stuff on and off. This worked when I initially set up dspam. I'm not sure what has changed, so I even tried deleting the database, removing dspam and starting from scratch. I have to figure this out soon because I have 20,000 users whose mail is being poorly filtered and I have no way to properly train dspam! I apreeciate any help I can get. Thanks! -Brad
