I am basically working on the same thing.
Which Exchange the SMTP server and the IMAP/POP3/MAPI server are all
combined as one entity. The peices start to become more obvious with E2K
which now uses SMTP as its basic transport and usess a modified version of
the SMTP server from IIS.
I have already shifted from the Exchange/IIS SMTP server for incoming
e-mail. I switched to Exim. Exim is fairly secure, fairly capable and fairly
easy to understand. It incorporates numerous useful features not in exchange
and what it is unable to do directly, can be accomplished with lots of tools
that it easily integrates with. I am currently using it for blacklisting,
spam filtering and limited virus filtering. I will be getting more
aggressive about spam and anti-virus as I get time to start fooling with
external spam and anti-virus tools.
If you are truly intent on leaving Exchange then you either need to look
at another comercial package or you have to be wiolling to abandon MAPI.
While I personally think this is a good thing, it does result in some loss
of functionality. While there is no good technical reason that M$ Outlook
can not support calendaring, tasks, contacts, journals, etc. stored on an
IMAP server, they do not. Even Outlook XP which atleast allows you to run
MAPI and IMAP concurrently, will not allow you to have any of these in an
IMAP folder. In fact it is actually worse than Outlook 2000 there. In
Outlook 2000 you atleast could read tasks, contacts, etc. if you configured
special views for that folder, but you could not modify or save them. With
OXP you can not even set the view on an IMAP server.
If you are willing to abandon MAPI - I have already done so, even while
retaining Exchange, then there are numerous OpenSource IMAP servers out
UW apears to be the oldest, and the easiest to set up. It can even be run
Courier and Cyrus seem to be the othter two major contenders and they apear
to be more "enterprise" class. For a variety of reasons I am looking to move
to Cyrus. But it seems to be by far the most difficult to get setup and
running - partiucularly current versions. However it offers some hope of
actually being fully integrated into my existing network, including
authenticating against an existing W2K domain. That said I have not yet
succeeded in getting a configuration that I am happy with. If you are
willing to manually setup e-mail users on the Linux box independently of on
your existing NT/W2K domain, and manually deal with separate password,
pretty much any of the IMAP servers show go in fairly easy for 100 users,
but you gain the independent maintanence tasks, of course I am not sure
anything can be as time consuming to maintain as E2K.
Finally, there are all kinds of licensing issues that go away. M$ was
giving away copies of Outlook at one point. I am not sure whether it is
still free, but regardless all you need is the right to use a client, there
is no need for CALCs or server license. There are no bizare internet
I am actively moving away from M$ server products because they cost too
much, don't work, require way too much time to maintain, and because I need
an army of lawyers just to figure out if I have actually bought whatever
licenses I need to be "legal", and after I have paid them, M$ changes their
license in some way and you can start over.
> Hello there,
> Which program do I need to use on Linux RH 7.2 instead of buying expensive
> Microsoft Exchange server and licences?????
> I need to find some good alternative for Linux RH 7.2 and administer about
> 100 users with email server (probably RH 7.2 instead of buying MS
> and they need to access their accounts with any Microsoft version
> outlook exp, eudora, etc...)
> Any idea??
> Thanks in advance,