On Mon, Nov 05, 2018 at 02:29:51PM +0100, Jan Foniok wrote: > Hi, > > Apple Mail on El Capitan doesn't seem to support protocols TLS higher than > 1.0 or 1.1. > Older hardware (9 years) is not supported by newer MacOS versions. > > A recent update of debian seems to have disabled these protocols for dovecot > imap. > > What is the best way out? Can TLS1.0 and 1.1 be enabled?
/etc/dovecot/conf.d/10-ssl.conf contains "ssl_protocols" variable that can be used to specify announced TLS versions. If it fails to work for you - it's probably possible to 'solve' the problem by downgrading "libssl1.1". Of course that also means opening your server to all kinds of exploitation, so replacing this "Apple Mail" with actual e-mail client is definitely the way to go. Reco