2) The most satisfying solution to spam I've worked out is the setup
described at the link below, using the Bayesian options and aggressively and
consistently training it (which you can automate to some degree).
http://www200.pair.com/mecham/spam/spamfilter20060630.html
Also, the Bayesian options can provide considerable overhead if your client
load is in the 1000s.
But if you're not comfortable with the Unix setup, I have another client
where we use Syamantec's Brightmail system. The cost is reasonable in our
situation, but charged by mailbox so maybe not so for your situation. It's
a pretty hand's off system which is provided with very regular updates from
Symantec. It is run directly on the Exchange server and I think is
compatable with 2007, although we run it on 2003.
3) I also use 10 MB attachments. I get gripes now and then, but really
files larger than that size are better transmitted via other means imo.
4) I allow only Secure POP and limit IMAP to IP ranges for the few
outstanding cases where I have pressure to allow it. I have never really
had a problem with it, but I strongly prefer the HTTPS Exchange tunnelling
setup where possible for both usability and firewalling purposes.
I am not a major campus admin, I just manage about 5 Exchange servers with
user bases under 100 people. If you're on a much larger scale you should
look to other peoples input.
Joseph M. Deming
Windows System Administrator
MATRIX/H-Net
415 Nat. Sci
East Lansing, MI 48824
(517) 517 884-2472
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===================================================================
All,
As the final testing phase of our new Exchange 2007
environment is ramping down and I’m deciding the final settings for the
production environment, I have a couple questions that I was hoping to get
some feedback on from other Exchange admins around campus:
1) Are you setting mailbox quotas, and if so, how large are you setting
them?
2) What are you using for antispam/antivirus?
3) What are you limiting attachment sizes to? I’m sure my send limit will
end up at 10MB because MSU’s limit is 10MB for receiving, but I’m
certain that the receive limit will be greater than that since 10MB is not
really all that large anymore.
4) Does anyone allow users to connect from other clients aside from Outlook
via IMAP or POP?
I think that about does it for now. Since this is a brand new installation,
not an upgrade, any other feedback would be greatly appreciated.
Thanks!
Jon
Jon Galbreath
MCSA/MCSE/Security+
Network/Systems Administrator
International Studies and Programs
Ph: 517-884-2144
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