[Akonadi] [Bug 337744] Subscriptions should be configurable before the first sync

[RJVB]

https://bugs.kde.org/show_bug.cgi?id=337744

RJVB <rjvbertin at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |rjvbertin at gmail.com

--- Comment #1 from RJVB <rjvbertin at gmail.com> ---
Second that.

Here's a good example where the current subscription model is completely
useless. I run an imap server on my main workstation; this is the most elegant
and appropriate solution I found to be able to archive email from different
locations (= computers). When one connects to the imap daemon, it's like
connecting over any other file/folder based protocol: one starts in the home
directory. So scanning for mailboxes means scanning each and every directory
under my home directory, possibly even scanning through the 33GB worth of files
that live there (more if imapd follows symlinks which I'm not sure du does). To
put this in context: I have about 550MB of email in my archive folder,
~/Mail/Archive.

I just tried this once again. The initial sync took about 15 minutes to grind
to a halt, possibly because of memory issues (despite the 8GB of RAM and 10GB
of swap).

Of course this example also shows that the current subscription mechanism
doesn't really allow to do anything before the 1st sync. After all, it appears
to be geared to subscribe to individual mailboxes (i.e. mbox type files on the
server). In my case the thing to do would be to subscribe to a *folder* on the
server, probably by typing the path into a text field (or else the initial scan
should not be exhaustively recursive but proceed level by manually selected
level). This action would then subscribe all mailboxes contained in that folder
(and ideally do this automatically for each new mailbox that might be created
behind akonadi's back, for instance with Apple Mail on a different computer).

What I'm describing is in fact what other email clients call "imap server
directory" or "prefix path", a feature which I think is orthogonal to the
subscription feature (and indeed often proposed in addition to subscriptions).

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