Hello,
i installed a mailserver (Postfix und Dovecot).
I activated SMTP with TLS on Port 25 without Authentication. (Server is not an open relay)
I can send and read mails without any problems on Android, Thunderbird oder Windows Live Mail.
Now i want to try this with roundcube:
tls://localhost
Port: 25
I got this error on sending message: (IMAP is working, can read messages)
(5.7.0 Must issue a STARTTLS command first).
Can someone help me? Why works Thunderbird or Windows Live Mails and not Roundcube ?