Probably this can be improved, but it works.
You can use the `post-new` hook, which is automatically run after `notmuch new`,
to do post-processing. See `man notmuch-hooks` for details on hooks.
+## tagging based on content
+
+Since notmuch currently does not index arbitrary headers, it can be
+useful to tag based on content. Here is a snippet that would fit with
+the 'new' tag approach discussed above.
+
+ for mid in $(notmuch search --output=messages tag:new); do
+ if notmuch show --format=raw "$mid" | awk '!NF{exit 1} /^X-Spam_bar: ++++++++/ {exit 0}'; then
+ notmuch tag +spam "$mid"
+ fi
+ done
## Other solutions