hi !
maybe i have better luck in english forum
i recently installed ubuntu 20.04 and setup postfix and dovecot. (both via starttls and standart ports 25 /smtp and 143 imapd)
Everything is setup... i can can send and receive emails via my client on localhost and remove from my laptop or mobile device.
Then i installed roundcube.. (i did it while ago on ubuntu 16.04) during setup i get failure:
SMTP send: NOT OK(Authentication failure: SMTP server does not support authentication (Code: ))
For me it seems that roundcube does not try to authenicate...
Imap is still fine...
i tried also to set tls://localhost but without success..
So any hints for me ?
I remember.. in a test installation of a beta version of 20.04 it worked.... but i do not understand whe is the problem.
Also i tried same procedure with the shipped roundcube of ubuntu, but its the same story...
Ciao Gerd
Ciao Gerd