TLS problem with iOS 9 Mail clients

[@lbutlr]

On 01 Jan 2021, at 16:01, Maik Musall <lists at musall.de> wrote:
> recently I migrated my mail server from an Ubuntu 16.04 box to an Ubuntu 20.04 box, so from dovecot 2.2.22 to 2.3.7.2, and to openssl 1.1.1.f. While everything else works fine, I have one important user stuck on an iOS 9 device that I need to support for a while longer, with which the IMAP TLS handshake keeps failing. From the logs:

macOS 9 does not support any currently valid and support TLS version and cannot communicate on the Internet securely.

> Does anyone have an idea what else I could try?

Have them get an iPad for mail? I don't think they can even use secure webmail.

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