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I'm looking for an open source alternative for zimbra which supports outlook and thunderbird as pop and smtp clients. I don't need collaboration suite.

If anyone can suggest or share their experience on MTA?

Thanks.

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closed as off topic by sysadmin1138 Aug 9 '12 at 17:17

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Product and service recommendations are off topic per the updated FAQ. –  sysadmin1138 Aug 9 '12 at 17:17

3 Answers 3

Check out this ServerFault thread titled "Exchange server replacement that runs on Linux"

Assuming you want one that runs on Linux, you have

And more that remain to be explored. If the server support open standards like SMTP and POP3, then there will be no problem with using Outlook, Thunderbird or any other standard client.

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Kerio runs on Linux just fine. –  Sven Aug 24 '11 at 7:03
    
@SvenW Well paint me purple and call me Barney, so it does! Post edited. –  Wesley Aug 24 '11 at 7:10
    
@WesleyDvaid These are a long list and there community versions support small number of clients on outlook. I have 350 outlook clients on peak time while total email accounts are around 500+. I am still looking for open source email management suite. –  Alam Aug 24 '11 at 8:05
    
@SilentPlayer: You need explicit Outlook support only when you want to use groupware functionality like Contacts and Calendars. Outlook can use IMAP just fine if only E-Mail is needed. –  Sven Aug 24 '11 at 17:29
    
@SilentPlayer All of those products can easily scale into tens of thousands of users. Your users using Outlook doesn't effect anything unless they also want to use shared calendars, like SvenW said. –  Wesley Aug 24 '11 at 18:29

MTA is Mail Transfer Agent (SMTP portion). MTA is maybe 5% of what Zimbra does.

I've been using Cyrus IMAP & POP for years, works great with both Outlook and Thunderbird.

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I need to managed domains with emails accounts including aliases and plenty of other options.. just like Zimbra provides. –  Alam Aug 24 '11 at 6:43
    
@SilentPlayer: Any decent MTA will handle aliases and plenty of other options. –  womble Aug 24 '11 at 8:20

Without a collab suite, all you need is a simple MTA and POP/IMAP server, plus maybe a management GUI for it all. A typical solution is postfix and Cyrus, with the addition of ISPconfig and the likes.

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