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Sal Collaziano

macrumors 6502
Original poster
Nov 7, 2007
Royal Palm Beach, FL
I need an ENTERPRISE level email client for the Mac. I don't care it cost $50,000 per email received. I need something that can efficiently handle 10-20 email accounts without a hitch. Any recommendations?

I'm currently using Postbox and I cannot speak about how bad it is without getting myself banned for filthy language.


macrumors 68000
May 18, 2017
Austin, TX
Have you tried Microsoft Outlook 2016? To my best knowledge Outlook is the only enterprise-level mail client for macOS, although it is heavily geared towards Microsoft Exchange in the backend and only offers rudimentary IMAP/POP3 support.

If that's what you are looking for then I would suggest taking a closer look at Mozilla Thunderbird, which should easily be able to handle 20 email accounts or more simultaneously. I've had it running with around 10 active accounts a few years back and it worked flawlessly.
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