ease-of-filtering. This is NOT tied to public-inbox names, as
messages stored by lei may not be public.
+=item IMAP INTERNALDATE, JMAP receivedAt, rt: search prefix
+
+The first valid timestamp value of Received: headers (top first).
+If no Received: header exists, the Date: header is used, and the
+current time if neither header(s) exist. When mirroring via
+git, this is the git commit time.
+
+=item IMAP SENT*, JMAP sentAt, dt: and d: search prefixes
+
+The first valid timestamp value of the Date: header(s).
+If no Date: header exists, the time from the Received: header is
+used, and then the current time if neither header exists.
+When mirroring via git, this is the git author time.
+
=head1 COPYRIGHT
Copyright 2021 all contributors L<mailto:meta@public-inbox.org>
# values for searching, changing the numeric value breaks
# compatibility with old indices (so don't change them it)
use constant {
- TS => 0, # Received: header in Unix time (IMAP INTERNALDATE)
+ TS => 0, # Received: in Unix time (IMAP INTERNALDATE, JMAP receivedAt)
YYYYMMDD => 1, # Date: header for searching in the WWW UI
- DT => 2, # Date: YYYYMMDDHHMMSS
+ DT => 2, # Date: YYYYMMDDHHMMSS (IMAP SENT*, JMAP sentAt)
# added for public-inbox 1.6.0+
BYTES => 3, # IMAP RFC822.SIZE