Timo Sirainen wrote:
On Jun 17, 2008, at 6:14 PM, Timo Sirainen wrote:
On Jun 17, 2008, at 6:03 PM, Farkas Levente wrote:
would it be possible to create a dovecot server as an imap proxy for
gmail and google apps?
imho many people/company would be love to use such a setup where he
can use gmail in vacation or any other time, but when the email is
real critical apps (not acceptable to wait 1 minutes for an email to
load or to open a folder/label) than he can use a proxy server eg.
dovecot which act as a imap proxy to gmail and can be hosted on
closer, faster server and this speed problem never happend. what's
more it can be used as a mail backup server too.
I've thought about a caching IMAP mail storage backend for Dovecot and
even started implementing it once, but it didn't get very far. If
someone wants to try to continue it, I can send what I've written so
far. Although it's mostly a copy of cydir backend with a tiny bit of
it replaced with IMAP code.
Now that I think of it, the IMAP backend should do only direct IMAP
backend accessing and if caching is wanted it could be a generic middle
layer. Might be also useful for other things like caching mails from NFS
server. Although Linux already has a cachefs for that.
yes, that's exactly what i'm thinking about. all imap command which
issued by the client to the middle layer should have to propagate back
to the backed (in this case gmail). but imho the hard part that we've to
assume that the backend (in this case gmail) is slow, so the middle
layer have to cache the imap commands to be able to propagate all
command to the backend (and command queue for all mailbox). so if the
connection between dovecot and gmail are fast then both has the same
messages and flags, etc. if the connection is slow than gmail may have a
small delay, but this delay probably won't be visible to the user (if he
not use the web interface at the same time too).
--
Levente "Si vis pacem para bellum!"
