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THUNDERBIRD: the SUCCESS STORY of LINUX! - 6.4M in Donations
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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).
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I'm curious what you mean by that. What exactly do you miss for these providers? (e.g. for posteo and mailbox.org, as those are the ones I am using)
Encrypted mail providers should require a bridge in order to be able to pull or send emails with. Protonmail has "Proton Bridge", tutanota has nothing. I see now that disroot, fastmail and posteo have direct SMTP access 🤔 That leads me to question: what actually is encrypted? Direct SMTP and IMAP access probably means they can read your mail.
There is encryption at rest (storage encryption), transport encryption and end-to-end encryption. E.g. Posteo has transport encryption and optional storage encryption. With activated storage encryption, Posteo cannot read your mail because the encryption key on their server is only usable with your password (which they do not store). Proton Bridge adds end-to-end encryption to Protonmail