I'm having a problem with "notmuch show" producing too many results. Can somebody tell me how to "notmuch show" only emails that a specific tag? Specifics (linux mint, emacs 24.3.1): I run this tagging query at the command line: > notmuch tag +xyz -- '(to:xyz@me.com or from:xyz@me.com or cc:xyz@me.com)' In emacs, notmuch-hello, I search tag:xyz and I get a buffer of emails that I expect. Then, I run on the command line: > notmuch show --format=mbox "tag:xyz" >xyz-all.txt the resulting xyz-all.txt contains many other emails (e.g. spam from linkedin, etc). In the end, I want to create a new gmail account containing only the above tagged emails. I will upload it with: > python imap_upload.py --gmail --box inbox --error Friends.err --user xyz --password xyz xyz-all.txt I did this several years ago and see, from my scripts, that I had the same problem. I worked around it by clearing tags, then creating an exclusion tag and tagging everything with that and, etc. ... I would prefer to know how to do this exactly, this time. Thanks in advance for any advice! pt