On 14 May 2021, at 23:43, Bill Cole wrote: > I'll jump in here, since Benny said he would be gone for the weekend. As > always, only he is a definitive source of info...
Thanks Bill. Yes, I saw that Benny takes the weekend off (which I think is a good thing). > To the best of my knowledge, that file will only be needed if you try a > search (or have a smart mailbox) that uses the Received header(s) of a > message. I might try to see what happens :-) > The Received headers form an audit trail of the transit of a message from the > author to final delivery, with an additional Received header added each time > the message is handed off from one server (or process) to another. If you > don't do mail forensics on a regular basis, you are likely to never miss its > index files. Because virtually all messages except Sent or Drafts will have 2 > Received headers, deleting the 3 files that make up the Received index > (.cache, .plist, and .offsets) will only delete them temporarily, because any > new message will cause the creation of new files for what MM considers a > previously unknown header. Yes, received headers I know about. I thought maybe a missing index file would create troubles. > Note that the "#quoted" and "#unquoted" files are for tokens in the quoted > and unquoted text of messages, with the "#lc" versions being for the > lower-cased versions of those tokens. That's why they are huge, and also why > you really should not experiment with deleting them to save disk and/or RAM > space. Despite Benny's suggestion, I would be extremely averse to removing > any of the index files with '#' in them, as those are for logical constructs > of MM, not actual headers. Got it. I had a look at my virtual mailboxes and all of them exclude the account that have all 2.8M messages, so virtual mailboxes only operate on accounts with a total of 100k messages. But as you wrote, MM is of course having indices over all of them anyway, and keep those indexes in memory. Patrik
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