this post was submitted on 04 Feb 2024
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Linux

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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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[–] thecrotch@sh.itjust.works 3 points 9 months ago

Postfix with MTA that filters maybe.

This provides very little of exchange's functionality. The closest thing I've seen in the open source universe is zarafa, which crowbars activesync emulation into an imap/caldav/carddav infrastructure, badly I might add, and with 3-4x the complexity, maintenance cost, and attack surface. I wouldn't even recommend it for a small business let alone a government agency with all the compliance regulations they have to deal with.

This is one case where Microsoft owns the market because they legitimately have the best tool for the job.