On Sun, Dec 11, 2016 at 6:35 PM, Sam Varshavchik <mr...@courier-mta.com>
wrote:
> Mike - st257 writes:
>
> On Fri, Dec 9, 2016 at 12:51 PM, Gordon Messmer <<URL:mailto:
>> gordon.mess...@gmail.com>gordon.mess...@gmail.com> wrote:
>>
>> On 12/09/2016 07:55 AM, Mike - st257 wrote:
>> > I don't yet have an answer why that file was present (doesn't exist
>> in
>> > my mailbox on that system), but moving it aside resolves the present
>> > mail delivery problem.
>>
>>
>> That file's presence indicates that a Maildir++ has a quota, and is
>> used
>> to track the quota and usage. Periodically, a maildir reader must
>> crawl
>> the entire maildir to re-calculate usage, which could explain the
>> timeout if an uncached read of all of the directories for that Maildir
>> take a *really* long time.
>>
>>
>> (Agreed.)
>> The user's mailbox is large enough (my opinion, at a few Gigabytes) that
>> crawling the entire maildir will take an extremely long time.
>>
>
> You should look into exactly how messages get ultimately delivered to the
> maildir.
>
> Although maildrop may be used to filter/sort through incoming mail, it is
> possible that something else actually delivers the mail to the mailbox.
>
> maildrop creates that actual filenames for each message with the size of
> the message encoded into it. This will skip the stat call when scanning the
> mailbox.
>
postfix is configured to transport mail to maildrop (by either a postfix
transports file or a mysql lookup).
>
> This will also explain why the calculated quota is off.
>
> If you don't need mailbox quotas, you can simply get rid of the whole
> thing, as you did. But if you do install mailbox quotas, you need to use
> maildrop, or the deliverquota helper to deliver messages to a
> quota-enforced mailbox.
>
It's a nightmare to implement quotas with some of the mailboxes at this
stage (there are a few larger ones than just that user).
For the present (holidays and so forth) I'm content with the backlogged
mail delivery problem resolved for now.
Thanks for the help.
--
---~~.~~---
Mike
// SilverTip257 //
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