Hi, folks. In my on-going war with spam [0], the new battle ground is false positives: I'm losing too much ham to mis-classification. For my first line of attack, I would like automatically whitelist every address to which I have ever sent mail. I realize this is flawed (spammers frequently pose as me) but it's my best hope at the moment for recovering false positives (which is more important than a couple of additional false negatives). It's fairly easy to find all such addresses, e.g.: notmuch address --output=recipients from:jrollins... But I'm having a hard time coming up with an efficient way to tag mail coming from any of these address (which total ~4k). The only command line way to do it that I've come up with is: <whitelist.txt xargs -l -I{} notmuch tag -spam tag:spam AND from:{} This works ok, but takes more than 20s to execute, which will slow down my inbox processing quite a bit. I could try to write a python script to iterate over all tag:spam, extract addresses from those messages, and match against the whitelist, but I doubt that will be any faster. Does anyone out there have any better suggestions on how to handle this kind of white listing? Anyone come up with any more efficient algorithms? Thanks in advance for any suggestions. jamie. [0] id:87sj49gha7.fsf@servo.finestructure.net