When becomes a version with CHACHA20-POLY1305 support becomes released?

I have no idea. What would be the benefit of using the CHACHA20-POLY1305 cipher in Thunderbird? Which mail servers do support it?

There is no calender .

Thunderbird has a built-in calendar. https://support.mozilla.org/en-US/kb/thunderbird-calendar-integration

Ist there a way to find upcoming release notes for thunderbird?

For release versions: https://www.mozilla.org/thunderbird/releases/

For the current beta (see 'What's new?') https://www.mozilla.org/thunderbird/channel/

This solves not one of my questions. First i meant not an calendar inside thunderbird. I meant an "upcoming release calendar" I know what is inside the actual releases and the already released calendar is not what i wanted to know.

Actually all new compiled Mailservers with exim4.88 compiled with openssl1.1.0 will have the new securitry-ciphers CHACHA20-POLY1305, like the most common pop3/imap server dovecot, which servers now this new TLS-cipher when compiled with a modern openssl.

The Thunderbird released version 45.* is only supporting AES128-GCM ciphers and nothing better. The actuel beta and the nightly version are very fine, buit when is the time to make it a RELEASE for all users ?

Regards Torsten

The actuel beta and the nightly version are very fine, buit when is the time to make it a RELEASE for all users ?

Thunderbird follows the Firefox ESR releases - see https://wiki.mozilla.org/RapidRelease/Calendar The next Thunderbird release version will be TB52 scheduled for March. There are only beta versions in between the release versions.

Thanks, that answers my question. Could it be marked somewhere on the webpage, that thunderbird follows the ESR releases of Firefox? Regards Torsten

http://emailmafia.net/2015/06/18/thunderbird-numbering/