I know this list can help, so here goes. We're using a web hosting management suite that uses qmail (with spamd and clamav for virus and spam protection) as the MTA. The software also includes two web mail clients (Horde is the main one that customers use). Replacing qmail would be difficult at best, but it can be configured to send mail through another MTA. To date, we've had problems getting qmail working well for all of our clients, especially those that send bulk mail to customers/subscribers. One problem I've run into with qmail is that there are several patches to it, but none of the patches, etc. are configured in a standard way. So, looking to see what is enabled and what isn't, making changes and tweaks, is difficult because the configuration and location of files does not match where the documentation says it should be.
What I'm looking at is adding a mail relay that would handle all the heavy lifting, leaving qmail to just sending and receiving for local mailboxes. That way I can leave qmail alone and not have to mess with the configuration much. The relay would handle all the spam and virus filtering, as well as relay incoming and outgoing mail to/from the qmail MTA. In addition, we would like to add IMAP support for ourselves and our customers. So, what do the mail gurus on the list feel would be a good solution for handling a LOT of mail for a LOT of customers (with the number of customers growing every week)? This includes security (spam, virus, blacklist, and whitelist support, configurable by customers) for all customers. The servers we use are Opteron dual core, CentOS 5, virtual managed IBM servers running under VMWare, dual homed with redundant SANs. TIA, PGA -- Paul G. Allen, BSIT/SE Network Administrator Greenest Host www.greenesthost.com -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
