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Have you looked at http://www.zimbra.com?

The Zimbra Collaboration Suite Network - Standard Edition is available for $28/user/year, with a minimum of 500 users. Additional users are $28 per user per year and can be purchased in 50 user blocks. The Standard Edition includes upgrades and the following Premium Support plan: * Access to the Network Edition-only knowledge base * Access to Zimbra support services portal, e-mail, phone and 7x24 crisis support

If you stick with Exchange on the backend and just want to replace Outlook then Evolution is probably your best (if not only) choice as it implements most of Outlook's functionality. It also support other mail client standards like IMAP and POP3 of course, so will seamlessly integrate with any almost other backend mail server too. Packages for UNIX are readily available and the Windows port is also stable, and although there isn't a pre-rolled installation package just yet, that can't be too far off.

I think Zimbra would meet your needs.

Zimbra.com Look at the demo. It can be made to integrate with AD's LDAP. It has calendaring, e-mail and contacts. And there are Outlook/Exchange migration tools. Also check out the forums on Zimbra.com. This should really be a Slashback...

www.zimbra.com

It's pretty much all you need. And it runs on MacOS X. And open source, kinda.

Just kill Exchange! ;) We've been using Zimbra at work since their early beta releases. No more reboots... They's now got iSync support so it's trivial to work offline. They've also got a web based live demo.

Just kill Exchange! ;) We've been using Zimbra at work since their early beta releases. No more reboots... They's now got iSync support so it's trivial to work offline. They've also got a web based live demo.

Zimbra is a neat new open source offering that is very Mac OS X friendly, integrates with just about everything and runs on OS X server and various Linux flavors.

Have you checked out http://zimbra.com/? It's a complete OSS email, contact, calendaring solution. I'm not sure about the Entourage integration, but it does have outlook integration in the commercial version. I'd be surprised that it doesn't work. It does come with an AJAX interface that's well worth looking into as an addition/replacement for entourage.
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tachijuan
http://amuyu.com/

Zimbra attempts to provide this (and much, much more):

http://www.zimbra.com/

Zimbra has a host of REST API's. These would allow you to access all your Zimbra data via SSH when needed. You could also just set up an SSH tunnel to get to the web UI, unless by SSH you mean command line only.

AJAX based drag-and-drop email is becoming commonplace now. At this point it's a "must have" feature, and any web based email program that doesn't have it is going to look as if it hasn't been updated since 2004 :)

Yahoo and MSN both have it now. Even the software that drives private email systems has it now. You've probably seen the screenshots for Roundcube, and you've probably seen the screenshots and swf-demos of systems like Citadel and Zimbra.

The point is, Google was the big trailblazer here, but at this point, everyone is now on that trail. The bar has been raised and rich AJAX webmail has quickly gone past "innovative" and is now "an expectation." Meanwhile, Google is probably busy cooking up the Next Big Thing. We hope. :)

Stick to standards compliant browsers. That gets you something that works on firefox and safari. You can even distribute a custom XUL app as a front end. That gets you around the browser issue neatly.

You don't write cross-platform applications by making a web site.

You better tell these folks.

And these

And then there are this lot

And then there's a little known crowd called Google. GMail and Google maps are both ajax based.

Oh, and you don't need a web site, just a locally running back end that uses http over the port of your choice. It's no worse than running a database where the DBMS runs in its own process or thead.

Java applications still suck, even on modern systems with scads of RAM.

"Appeal To Suckage". Isn't that a logical fallacy?

Functionality you get for free with native applications is either missing or doesn't behave properly.

I belive that's called "writing buggy software". Its not java's fault if you can't use it correctly. It's not my favourite language either, but I don't blame the language if my programs don't work.

As a developer, when my choice is between "Application for one platform that works beautifully on one platform" and "Application for all platforms that falls short on all of them," I know what my choice will be.

So? No one is going to force you to write cross platform apps. Just because it may increasingly yeild market advantage, that doesn't make it compulsory.

You DID have a better argument here than "I like what I like and everything else sucks" didn't you?

You probably mean C# here... "dotNet" is an incredibly nebulous term,

Um... no. dotNet (or more properly .NET) refers to MS answer to Java. More specifically to the CIL and the .NET runtime. There are a dozen or so langauges that can generate executables for the dotNet runtime. C#, granted, but also C++, Java, VB.NET... even Perl.

If you want to see how elegant cross-platform can be and has been for years, open up Notepad, MSN Messenger, Word, and Internet Explorer. There's not a UI commonality between the lot of them. Notepad is still stuck in the 80s. But they're all supposedly part of the same system.

So you're saying that because MS can't keep a consistent look and feel across multiple apps on a single platform, it therefore follows that no-onecan keep a consistent look-and-feel for a single app across multiple platforms?

What were you saying about crack pipes?

Do you really want every application on your system to be that divergent in terms of UI? That's invariably what happens.

Counter examples: gmail, gaim, firefox.

Why aint nobody talking about Zimbra.
Isnt it meant to be an Exchange killer??

This is more fud in a way, there are several choices in linux; Kontact, Evolution and Thunderbird all offer much better email functionality than Outlook. Where there is a difference is in providing exchange functionality and that too exists on several fronts, Kolab, OpenExchange and Zimbra all provide Exchange functionality and Horde/Kolab and Zimbra both provide compelling web interfaces that are equal to what is provided by Exchange in terms of shared calendars and shared addressbooks. I think the only thing not provided yet is the ability for mail rules to be seamlessly migrated from the mailclient to the server so you don't have to setup your mailrules/filters twice. Thunderbird needs solid calendaring, this is true. This is probably the biggest problem out there because in doing windows to linux migrations you ALWAYS want to migrate them in a staged format by getting them onto the apps they will be using in linux while still having them on windows and thunderbird is the only one that is crossplatform. Unless you migrate them to web based solutions like Horde/Kolab or Zimbra. Personally i use Horde/Kontact and love it although i will admit Zimbra is pretty sweet looking having been done in AJAX. http://kolab.org/ http://zimbra.com/ http://www.openexchange.com/

I think they have things like http://www.zimbra.com/ in mind.

So then please check out http://www.zimbra.com/ and say that again!

Lot of traffic coming our way because of this story. Just wanted to pipe in and say that the live demo on our Zimbra site is running our older 3.0 M1 release. Also, the live demo is heavily throttled. Last week we posted some screen shots from a server running (to be released soon) 3.0 M2:

http://www.zimbra.com/blog/archives/2005/10/calend ar_candy.html

Check out the new group calendaring screen shots that went on our blog yesterday:

http://www.zimbra.com/blog/archives/2005/10/calend ar_candy.html

Not what I would call "comprehensive" but it's a start:
http://en.wikipedia.org/wiki/List_of_websites_usin g_Ajax#Mail

This one is kinda cool http://www.zimbra.com/

Ajax is the first genuinely new thing I can think of this century.

you could always check your email using Thunderbird and the appropriate webmail plugin too, imo preferable to having OE installed

http://webmail.mozdev.org/installation.html

http://www.zimbra.com/ is very cool as crossplatform AJAX email apps go, and it's opensource

The Open Source Zimbra AJAX email server/client is news. When MSN develops a commercial application, that's just an advertisement. Well, I guess you can use it as a confirmation that it's the direction email is going, since commercial vendors are deploying the technologies.

Currently, MS's development process for hosted apps (MSN, Hotmail, MSN Search, etc.) is moving faster than for PC-based apps and OSes (Windows, Office, etc.).

It's no secret that MS's product management are using the hosted apps as experiments to see in which direction to take their other applicatons. Go take a tour of the Zimbra email client and see if you don't think it's striking fear into the hearts of MS's Exchange/Outlook product managers. Zimbra's not just different--it's obviously superior. MS needs to use Hotmail as the crucible for testing new features that they hope to shoehorn into Exchange/OWA in the future. If they don't, somebody like Zimbra's going to come and take their market share away.

It seems that AJAX, while being a rather old idea, has taken over all new webapps these days. From Gmail to the Hula Project to the fantastic looking Zimbra Collaboration Suite, this reduced reliance on the old client => server model is a great step. I found more info on Kahuna beta from someone who wrote about it back in August.

Now that I'm playing with Ruby on Rails I'll be very interested in the next 'killer app'; a Ruby on Rails/AJAX based webapp client. ...drool...

We are working on getting bugzilla opened up. In the meantime, http://www.zimbra.com/forums/ is the place to report/discuss problems like this. You might also want to search and see if your problem has already been reported by others and if there is a known fix/workaround. IMO install issues should always be discussed/checked on the forums before being promoted to bugs.

How about a HPC running Zimbra http://www.zimbra.com/ ... e-mail for the masses!

Have you looked at Zimbra http://www.zimbra.com/. It seems to aim to be an Outlook/Exchange replacement, is implemented "in" AJAX, and is open source. So the (/.-ish) geek factor should be biggish.

We've put the demo back up now that the bulk of the slashdotting is over... http://www.zimbra.com/demo/

We actually planned to upgrade our hosted demo last night. Just after we took the demo offline the story hit. We stayed up all night trying to figure out why things were so slow; when the CPU on the web servers were 90%+ idle. Turned out to be that the firewall at our ISP was only 10Mbit so it effectively throttled our site. This has been resolved, so we'll put the demo back up soon. You can see the bandwidth usage here: http://downloads.zimbra.com/slashdot_firewall_cap. png/

The Zimbra architecture for scaling mailboxes across hardware boxes is a lot closer to the cyrus-imap way of scaling - don't let the presence of tomcat/mysql mislead you into thinking otherwise!

You can have M postfix boxes route mail to N mailbox server boxes. Each of those N mailbox servers is/runs the { tomcat, mysql, filesystem } triple. Instead of one huge database with all your users' metadata, you partition your users across these each of these mailbox servers' database instances. Postfix can route mail via LMTP to one of those N mailbox servers where the mailbox actually lives (we use transport_maps). The Zimbra web UI served up from each of these mailbox servers can redirect the user to the mailbox server on which their mailbox actually lives - eg, think of mail.yahoo.com which redirects you to us.f300.mail.yahoo.com. In the future, don't rule out us making this even more transparent. Someone we know, in a multi-node install test, configured perdition (the IMAP proxy) to consult user info from LDAP and proxy IMAP connection over to the user's actual mailbox server.

See also this thread on our forums.

a 303KB 900x675 GIF (with no alt tag) to tell me I need to download the Flash plugin.

That'll impress the folks on dial-up.

Replace http://hula-project.org/ with http://zimbra.com/ in your post and the statement becomes false how?

Brian

Beyond using its own MTA (postfix), the problem for larger sites is that each box is expected to stand alone. There is no way to have webservers, mailservers and database on seperate boxes.

I tried building this for Slackware 10.1 over the weekend and only had to install ant and jdk.
It comes with everything included: mysql, spamassassin, tomcat and postfix.

One issue were the required port mappings:

smtp: 25 mapped to 7075
http: 80 mapped to 7070
pop3: 110 mapped to 7110
imap: 143 mapped to 7143
ldap: 389 mapped to 7389
https: 443 mapped to 7443
imaps: 993 mapped to 7993
pop3s: 995 mapped to 7995

The install/run scripts were very tailored for RH/Fedora.
This page has a good walkthrough of a developer install.

make dev-install got me going on the right path.

It was unfortunate that I ran out of weekend before getting it to work as I really liked the look of the calendaring integration and overall interface.

For FC3:
http://downloads.zimbra.com/3.0_M1/zcs-3.0.M1_21.F C3.tgz.torrent

Like this?

I wonder if the open source http://zimbra.com/ isn't what we'll all be wanting to use next. Check out the live demos on their site, I was very impressed with their ajax magic.

Check out the new cal for Hula http://hula-project.org/Hula_Server - amazing work.

And the front end to the webmail for Zimbra http://www.zimbra.com/

Really, really nice stuff.

Their directory far surpasses AD. You can also look into Netscape Directory.

For groupware, check out Zimbra (http://www.zimbra.com/). The Flash demo is great.

This new company called Zimbra launched a few days ago a web-based email application that looks very similar to Yahoo's new mail service.

I guess it sucks to be them (Zimbra) now. They thought they created a very innovative email app.

Some screenshots:
http://www.zimbra.com/screenshots/

If you've been to our website and you believe you're a fit, you know where to send your resume. :)

http://www.zimbra.com/careers.html

http://zimbra.com/ look at Zimbra

Try the hosted demo. These guys, and their work, are /is awesome.

disclaimer: I do not work for them, but it would be cool if I did.

http://www.zimbra.com/ The flash demos look nice anyway.