On Fri, Nov 27 2015, at 11:04:08 +0100, Simon B wrote: > It's odd, because I thought I had advanced settings shown by default.
AFAIK, showing the advanced prefs can only be enabled for a specific session, but not permanently. > However, I'd still like the ability to permanently delete mail from any > folder. All I can say about that it that from my point of view, that feature is difficult to implement, because it would require one to *reliably* (re-)set the flags of potentially many mails in a folder since IMAP does not allow the deletion of a single arbitrary message per se. So it can only be done by emulating this, i.e. removing any "deleted" flags present, flagging the message in question as deleted, doing EXPUNGE (or CLOSE, for that matter) and resetting all message flags removed previously. Since there can be several IMAP clients active on a mailbox at any given time, it would be very hard to get this right since these operations are not atomic. That's true especially if you consider that there could be trouble with the imap connection in between the commands required to do this, so this might require to implement some "to do list" of IMAP commands that would need to be (reliably) stored somewhere until the connection to the IMAP server can be re-established. In essence, I would not consider the effect of this worth the effort needed. Jens
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