On Wed, Nov 24, 2004 at 07:15:43PM +0200, Uffe Pensar wrote:
[141 lines of quoted material deleted. please learn to trim your quotes ]
ok thanks for all the good advices, I will install postfix and have a
look att the dovecot and xinetd packages
if you're running dovecot, you don't need xineted. it is a standalone daemon,
which has it's own (configurable) limits on maximum simultaneous connections.
but as a quick fix its seems that authenticating from a local server
(instead of radius) and restricting the number of webmailsessions has
helped for the moment. But I suppose we have to buy more servers in
the near future.
yes, separating the tasks of 1) sending & receiving mail and 2) storing it &
providing imap/pop/webmail/etc access is very useful.
remember that mail is an I/O bound system. i.e. most of the time the processor
is sitting idle waiting for disk I/O to complete. upgrading the CPU will do
little or no good here. to improve performance, you need to improve the I/O
speed - you can do this with faster disks, hardware raid card with large
non-volatile cache, and by adding more RAM to the system. or by spreading the
I/O load over more disks and/or more servers.