What about Lotus Notes?

>I've been keeping part of an eyeball on potential Exchange replacements for some time. I gather that nothing matches the capabilities of Outlook+Exchange, it's one of MS's crown jewels in the enterprise space.
>
>SME Server apparently comes with QMail: http://wiki.contribs.org/SME_Server:About#Platform_Specifics
>
>Googling shows some people are trying to install Zimbra on SME Server.
>
>For lurkers there is some overview information at http://www.outlookipedia.com/outlook/share-outlook-calendar.aspx .
>
>Some more resources apparently reviewed June 9, 2013: http://www.slipstick.com/outlook/sharing/sharing-outlook-calendar-and-contacts/
>
>Hosted Exchange is becoming more competitive for small business, for those cases where the cloud is an option.
>
>>Hi,
>> Has anyone come across something that will handled Outlook shared Calendars with SME?
>>
>>>>http://en.community.dell.com/dell-blogs/software/b/software/archive/2013/07/10/windows-small-business-server-discontinued.aspx
>>>>http://www.theregister.co.uk/2013/07/11/death_of_microsoft_small_business_server/
>>>>
>>>>What now, SMEs?
>>>
>>>I'm trying to get up enough nerve to install SME and see if I can use it instead of SBS.
>>>
>>>Thats the Linux SME Server - http://wiki.contribs.org/Main_Page