"Konstantin Vasilyev" <kmansoft@rambler.ru> schrieb am 18.07.20 um 16:16:55 Uhr:

>    18.07.2020, 14:30, Benny Pedersen <me@junc.eu>ratatouille skrev den
>    2020-07-18 13:20:
>
>    > Commenting just ssl_min_protocol = TLSv1.2 seems to solve the problem.
>    > So I have the default ssl_min_protocol = TLSv1
>
>    with means that the device running k9 is not supporting TLS 1.2 yet
>
> TLS 1.2 is enabled by default in Android versions 5.0 and newer.
> For earlier Android versions, K9 has (or used to have) a setting to "harden" its
> SSL/TLS settings, which enables TLS 1.2 as far back as 4.3 or something.
> -- K

The android runs Version 4.0.3 ;) Don't know how to enable TLS 1.2.

  Andreas