Thursday, September 30, 2021

Open Source Email

ISPConfig

Zimbra

Mailcow

Cuttlefish (not a mail server, but an open source alternative to transactional mail services like Mailgun and Sendgrid).

Postal is another product like Cuttlefish

hMailServer

iRedMail



at

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Basic Principles of Frequency Modulation (1944)

War Department video on why the military needs FM instead of AM. https://www.youtube.com/watch?v=AzvxefRDT84

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