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Working 4 days (30h) a week for years now. There is no way for me going back into a 5 day week. It means less wage but for me it’s worth it. I have more time for my personal interests and family. I know that this is not an option for everyone but I am always a bit surprised how few colleagues in comparable circumstances are choosing this option.

Karma!

I recommend using ssmtp, a CLI client to send emails using an existing email provider. One, out of many pages explaining how to use: https://wiki.archlinux.org/title/SSMTP

Not being end to end encrypted by default is the opposite of privacy.

Yes, there is https://mattermost.com/