I want a Microsoft Exchange FREE Alternative + installation

I'm looking for a FREE alternative to Microsoft Exchange, and i need the same bidder to install and set up the application on my linux server (most likely CentOS 6.3), but if it works better on other Distros, please mention it to us.

1) find the right FREE alternative to microsoft exchange server which has features like below.

2) must have webmail which looks professional

3) must work with microsoft outlook, even if it needs a connector

4) must sync all calendar, contacts, emails between server and outlook

5) must be able to share files (like a briefcase folder located on the server)

6) i want to sell seperate accounts to different companies based on their needs, either the ability to limit their quota space per mailbox created, or limit the mailboxes created per client. if it has the option to limit features like the "share files" option, to make it as an option sold separately, that would be great too.

7) full system needs to be setup, FULLY configured on my server, and you must show me how i can create accounts, and how i can get them to use their own domain names (ex: if i own [url removed, login to view], i don't want email accounts created to be related to my own domain name, but i want to be able to sell email accounts for clients own domains)

8) server must be configured properly to be fully secure against hacking, malware, etc...

9) you must install an SSL certificate for me, I will supply the SSL certificate when you are ready.

10) you must help setup a "fail-over" type of server, where we can have 2 servers setup, both have identical info (as up-to-date as possible), where if one server fails, the next server will take-over, to keep everything almost 100% uptime guarantee.

I have checked a few options online, but most free options i found are very limited to the features, and i don't mind purchasing a solution, but if the price is fair, and without limitations (ex: 2users, 10 domains, 15 email accounts, etc...), because with limitations like these, i will not be able to make money, and in that case, there is no use for me to even bother building this system.

the best one i found so far is Sogo, but it's missing the "shared-files" feature, unless there is an easy option, some how we can integrate it into Sogo, that would Sogo the most suited email/collaboration software i find so far (which is FREE).

your recommendations are highly appreciated, and making sure no cheap webmails like squirrelmail or horde, because those are not considered professional at all.

Payment: We will Escrow full agreed payment upton bid award, but no payment will be released until project is 100% completed to our satisfaction. if you are unable to live with this rule, please don't bid.

Outrageous bidders, please stay away, as your bids will get either ignored, and/or deleted.

Notice to all bidders: if you are showing us previous work you have done, please do not show us any work which is not related to this project at all, we are not interested to see your web design skills, and or graphic design skills, as this is not related to our project.

thx and good luck to everyone

Skills: Anything Goes, Linux, Microsoft Exchange, System Admin, Windows Server

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About the Employer:
( 20 reviews ) Edmonton, Canada

Project ID: #4019102

10 freelancers are bidding on average $315 for this job


Hi I can do this. Thanks

$500 CAD in 15 days
(18 Reviews)

Hi I can help you with this project. Please refer personal message for more detailed information. Regards Govind

$900 CAD in 6 days
(7 Reviews)

I am a Linux Consultant

$120 CAD in 3 days
(13 Reviews)

I have extensive experience that meets the qualifications, and would be happy to complete this work for you. We can speak via telephone, skype, yahoo im, aim, msn messenger, or irc chat. Thank you, Sean Brady

$250 CAD in 7 days
(6 Reviews)

Hi. I can do all of the above at the specified time. I am a professional system administrator and my experience is more than 9 years of practice.

$250 CAD in 7 days
(4 Reviews)

Hi, I'm an experienced system administrator, have experience with Linux and Windows server. I hold RHCE since 2009. Ready to finish this job. Thank you.

$250 CAD in 0 days
(4 Reviews)

I worked as a System Specialist for IBM in the last 6 years. I have complete skills in everything you look for. I provided support for all Latin America until the last month where i had to ask to quit to take care of m More

$350 CAD in 7 days
(0 Reviews)

I can satisfy you with Open source Professional Web mail with more then M.S Exchange.

$250 CAD in 10 days
(0 Reviews)

We are freelance software developers. If you contact me I can give a quote for your project and we can discuss the details. <b><i>Removed by Admin</i></b>

$140 CAD in 1 day
(0 Reviews)

We are freelance software developers. If you contact me I can give a quote for your project and we can discuss the details. [url removed, login to view] by admin

$140 CAD in 1 day
(0 Reviews)