Mathieu Kretchner wrote:
kbajwa a écrit :
Hello:
I think you are missing a point which is most important, i.e., what
type of
support Cyrus vs Dovecot offers. In my experience:
Cyrus = 0
Dovecot = 100
My personal experience.
Kirt
I guess you've right but I can't post this answer at Cyrus mailing
list. I'm just trying to have my own opinion of imap server and I
already have sarcastic answer on the cyrus mailing list !
Reading the cyrus list I think the above quote might be a bit unfair and
accidently crossposted?
In any case I only have experience of dovecot and it's used in some
larger installs such as the old webmail.us, now 1&1 (I believe). I
think your installation is probably large enough that you might want to
do a trial migration of a couple of accounts and see if migration is a
problem. Certainly for all new servers I would STRONGLY recommend some
sort of virtualisation option (I use linux vservers, lots of other
options available). This makes it fantasically easy to boot up (say)
three instances of your target software installation, perhaps all with
different configuration options and compare them easily. I used this as
a solution to migrate from Courier and also recently when I was
migrating from 32bit to 64bit guests - essentially you spin up your new
guest, get it all ready, test it like made and then in a couple of
seconds you can down the live guest and boot up the new guest. I
separate out all signficant data from the guest partition so try to keep
the actual installations under a couple hundred MB each (even that feels
bloated, but hey) and this makes it simple to boot up a copy of a guest
to test some change without having to copy too much
I personally picked dovecot because I worried about the horror stories I
read about with cyrus. However, both are clearly the two best options
available for opensource solutions right now and both are used in large
installations so you should be very happy with either.
With regards to functionality it would appear (I don't use cyrus) that
cyrus has more "admin tools" to do stuff, but Dovecot is built to be
more "hackable", for example you can easily run a script before each
(imap, etc) login and hence do some very advanced stuff through that
route. Plugins also appear to be quite easy to write to extend dovecot
in new directions
On the cyrus list they mentioned email retention policies. Now some
people are going to say that this is really a job for the MTA
(postfix/sendmail/etc). However, you have some plugins which might get
you partly towards solving that need, but nothing out of the box which
would give you a cast iron (stand up in court) kind of archiving
control. However, you can get close I think
Ed W
