Ralph Angenendt wrote:
Gary Richardson wrote:
It's been awhile since I looked into it, but I recommend outsourcing your
email.
Erks. I wonder why *anyone* in his sane mind would do so (okay, here it
is smallish ISP but I - as a customer - trust my ISP to handle my mail
and would get another ISP as soon as I knew that it is outsourcing mail).
Thanks for the input. Other comments below.
For mail server, I guess I should look at an MTA and IMAP/POP
server
that supports LDAP and/or MySQL for users. Postfix should be a good
choice for MTA, as I know it (at least a little, but I know sendmail
better).
Then why not use sendmail? Once it is configured properly, maintaining
users is the same as with other MTAs.
I know that it supports ldap, but does it support MySQL or another DBMS
for addresses lookup?
For IMAP/POP, I'm not sure... Would dovecot be sufficient, or
should I try cyrus. I'd rather use components that are available for
base or extras repository (or rpmforge). I think that squirrelmail and
horde would do a good job for webmail.
I've heard that dovecot scales pretty good. If you want to be on the
safe side, cyrus probably scales way beyond what you need, but is also
harder to maintain.
Ok, but does it scales good like in one server can handle a lot or that
it is easy to have multiple dovecot servers serve one domain in a
transparent manner?
There shoudn't be any troubles having some redundancy for DNS, web
servers, mtas, but what about IMAP/POP?
If you're already thinking about drbd - why not share the imap store
also?
You're right. But I'd need to have a second server ready to take the
load if the first crashes.
And: There still is the Cyrus Murder for bigger setups, which
allows for flexibility within IMAP frontend and backend servers.
I wasn't aware of the existence of Cyrus Murder, I'll look it up.
Or maybe IMAP proxies?
See <http://cyrusimap.web.cmu.edu/twiki/bin/view/Cyrus/CyrusCluster>
which should answer most of your questions regarding HA within an imap
setup.
Wow, that is great, thanks!
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