email/README.md

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# Custom Filter Framework
## Rules
A single rule should be able to match multiple things and have multipl
actions, i.e.:
### Example
```
Hdr1: regexp
Hdr2: regexp
<action1>
<action2>
```
### Misc
* Pseudo header for To/CC. Some way to say "directly to me" that works with
BCC.
## Use cases
* Simple `To: me@example.com` -> add label `@Me`
* `From: wife` only `To: me` vs `From: wife` & `To: multiple people`
* `To: important CC: unimportant` still gets `@Important`
* Mix AND, OR and negation in a single rule.
## Actions
* Add label
* Mark read
# Threading
jwz or something simple first? gmail has a nice property of being able to
see message / thread ID by default, and then fetch by message or thread ID.
Fetch by thread ID only way to do batch processing via API.
# Old Notes
* Add `fast_header` table that is just the values we`d want to search on
(i.e. the headers we hash on, plus whatever is needed for jwz threading).
* Investigate stored procedures that update `fast_header` automatically when
we we add bulk headers to table `header`