• thecrotch@sh.itjust.works
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    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.