[Dovecot] More effective mailbox fetching over high RTT link

[Andrzej Adam Filip]

Timo Sirainen <tss at iki.fi> wrote:

> On Sun, 2009-08-09 at 22:20 +0200, Andrzej Adam Filip wrote:
>> Could you offer some suggestion how to fetch mailbox content over 
>> high RTT link (with negligible packet loss)?
>> 
>> Currently I use IMAP+IDLE *but* it fails to use full available bandwidth
>> due to high RTT and "send command wait for response" nature of POP3 and
>> IMAP4 protocols.
>
> I'm not entirely sure what you want. Download all new messages
> automatically whenever they show up?

It is "maximum version" of what I would like to get.
( maximum: IMAP+IDLE equivalent, acceptable: faster POP3)

> And by "mailbox" do you mean "user" or "folder"? 
> So would you want to download all new mails in all folders?

One folder is acceptable. "All folders" would be nice.

> And is it ok to create your own software to do the downloading?

I was thinking about creating perl script for the task.

> If all of them were "yes", the best you could right now would be to set
> up a virtual "all" mailbox containing all mailboxes. Then in IDLE you'd
> see whenever new messages pop up and then issue FETCH n:* BODY.PEEK[] or
> whatever. There's also IMAP NOTIFY extension that would allow your
> client to ask server to immediately send the message body instead of the
> client having to ask for it. But Dovecot doesn't currently support that.
>
> Or if you just always wanted to download all mails, again a virtual
> mailbox and FETCH 1:* BODY.PEEK[] gives you all mails.

-- 
[pl>en: Andrew] Andrzej Adam Filip : anfi at onet.eu
Men never make passes at girls wearing glasses.
  -- Dorothy Parker