>From personal experience, you can do a couple dozen k of users (30-40k) on a >postfix / dovecot / roundcube type setup, but the 100k and up levels start to >get pretty testy and complicated. It tends to be the area that enterprise >email solutions start to get useful, mostly due to the multi server >integration (multiple frontend incoming servers, with multiple backend message >stores), and threaded mail handling (versus multi process like postfix and >dovecot).
Having multiple domains can help, as you can farm out individual domains to distinct servers. Just something to keep in mind. Hardware is better now than when I used to do it, so you may be able to get those numbers some higher, but eventually it will become a loosing battle, and none of the open source stuff is threaded, which is your biggest performance gain at these levels of mail handling. -Steve On May 22, 2013, at 3:05 PM, Gabriel Gunderson wrote: > On Wed, May 22, 2013 at 2:43 PM, Robert Merrill <[email protected]> > wrote: >> I've done this with a few very small number if email users a few years back > > So far the Postfix / Dovecot / Roundcube set-up I have hosts for about > 60 domains and almost 12k users (not all active). They think they'll > have 100k users within the next year. > > So we're past the numbers where we can fake it with gmail ;) > > Thanks for the ideas; keep 'em coming! > > > Best, > Gabe > /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
