we have about 10000 users in our
A fair number of people. And being a university, many new ones will arrive, and many will leave. So you will have some constant turnover in your user-base.
what i'm looking for is which mail
server is appropriate for our uni (we
used daemon before) .
There are several mail servers to choose from. By the way, which "daemon" did you use?
the most important things for me are
stability , trust , having the best
best performance with the usual
Pretty much "standard fare" for mail servers. Go on.
(someones said postfix and qmail are
the best ones) can this be a right
Under the right circumstances, either of those mailers will work just fine. But you need to outline some of your requirements a little more.
using ms exchange and for alternative
postfix mail server in the MX
layer(this can help when the main
server can't recive mails).
This is a pretty typical setup for some companies, as it allows the Exchange server to not be exposed at all to the outside, and there are several Postfix setups that do a decent job of filtering unwanted email and virus attacks.
plz help me to choose the best one .
I think that several people here can recommend different solutions; Postfix + Amavisd + Dovecot has worked fine for me for several years, although that setup has changed for me recently.
Look. I'll just come out and say it, you need to provide more details about your planned deployment. To answer this correctly, you'll need to outline:
What percentage of users are permanent (university staff) and what percentage are temporary (students)
What kind of email volume you anticipate having. 1,000,000 messages a day? 100,000 daily? Maybe just 25,000?
What kind of storage requirements you might need. This will have an impact on performance if you allow users to turn email into their personal filing system (which they sometimes have a bad habit of doing). The larger the attachment size you allow, the more storage you potentially could use.
What kind of client access you wish to provide. IMAP over SSL? POP over SSL?
What kind of clients are you using? Outlook? Thunderbird? Eudora? OS X Mail?
What kind of authentication are you using? Active Directory? Kerberos? Old-fashioned username/password pairs in a flat file?
How many servers can you dedicate to this project? 10? 5? Just 1?
How many hours are you willing to put into administration and upkeep? 10 hours a day? 2? Just a few minutes?
Do you need to back up the data? Do you have sufficient backup storage media to cover your primary storage?
I'm sure there are a few more questions I've missed as I'm writing in a hurry, but this should cover the basics.