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!