+Here's a very general and ad-hoc approach to initial message tagging.
+The [new] config section allows you to control which tags new messages
+receive. This sets all new messages to get the "new" tag:
+
+ [new]
+ tags=new;
+
+After running "notmuch new", all new messages will be marked "new".
+You can then do various tag post-processing by just acting on messages
+with that tag. For instance, a post-processing script might do the
+following:
+
+ # immediately archive all messages from "me"
+ notmuch tag -new -- tag:new and from:me@example.com
+
+ # delete all messages from a spammer:
+ notmuch tag +deleted -- from:spam@spam.com
+
+ # tag all message from notmuch mailing list
+ notmuch tag +notmuch -- to:notmuch@notmuchmail.org
+
+ # finally, retag all "new" messages s "inbox" and "unread"
+ notmuch tag +inbox +unread -new -- tag:new
+
+Since the post-processing is only acting on a few messages, it is
+generally extrememly fast.
+
+## Other solutions
+