[Dovecot] Many messages clustered around the same date.saved value

[Joseph Tam]

Timo Sirainen <tss at iki.fi> wrote:

>>> Which mailbox format? With Maildir the date.saved is taken from
>>> dovecot.index.cache file, and in some cases that might get dropped.  If
>>> it does, then it fallbacks to using the file's ctime.
>>
>> mbox.
>
> Ah, with mbox there isn't any usable fallback for date.saved.  If it's
> not in dovecot.index.cache, the current time is used.

I'm a little confused as to why it needed a fallback.  In other words,
why wasn't date.saved put into the index as soon as the IMAP operation
copied it into "Trash"?

If this data isn't set at that time, when does it get instantiated?
When I actually ask for it?

Joseph Tam <jtam.home at gmail.com>