We are in desperate need of a new e-mail server solution and would
like to get opinions and real world benchmarks of what others are using.
Here is our current setup and problems:
New Intel Xeon Xserve 4GB RAM, OS X Server (was 10.4.10 now 10.5)
using OSXS built-in mail, mail store is on connected Xserve RAID (RAID
There are 650 active mail accounts, with anywhere from 200-350 users
being connected at once, (at least trying).
All accounts are IMAP.
We have set up Shared folders, also.
Users do not have mail quotas.
All users are in Open Directory. The mail server is also a replica of
The problem we are having is the server can not handle this load. We
have worked for months with Apple and have not been able to make
things better. At peak times the server comes to a crawl, so much so
that mail connections time out etc.
So here is what we need:
Software that will run on an Intel Xserve/OS X server.
A solution that will do IMAP.
Can handle up to 400 users connected (which could possibly mean
thousands of IMAP connections).
The ability to do Shared/Public folders.
Integrate with Apple's Open Directory, either for authentication or
Some ability to migrate mail/messages from current system to new system.
Since we've been dealing with this major problem since the middle of
August we really are ready to move on to another solution.
Thanks for your input.
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