On 7/7/2016 7:47 PM, David Lang wrote:
I started with Cyrus. How would Dovecot be any better? Does it have
back-end replication/clustering/failover like Cyrus does? or some
other feature that would let me replicate/split my mail repository?
I routinely have high tens of thousands, to low hundreds of thousands
of mail in a single folder, cyrus handles that well (even without a
SSD), how would Dovecot handle that?
Dovecot has their dsync tool (kind of like rsync for Maildirs).
It works extremely well.
We have a several clients at $dayjob who maintain their IMAP servers in
VMs/HW Servers here and then dsync down to a dovecot/postfix box at
their office. That way, they always have a local copy for when they are
at their office. It cuts down on the junk traffic out the gateway when
you have a limited office internet connection shared by a bunch of
employees.
They also rate limit outbound SMTP from the office mailserver's outbound
queue. The employees can dump email into the queue at line speed, but
the outgoing SMTP doesn't suck all the BW out of the connection when its
a bunch of huge files.
Then of course for mobile and their home, they just point their imap
client at the public VM.
Again works really well and the only issue is which logs you need to
look at when debugging an email problem, but in the end its either one
or the other.
Finally, you get an offsite backup of the MailStores as a freebie, in
case something 'bad' where to happen to either the public or office server.
Sincerely,
William Kern
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