Hello,
Roundcube always use TLSv1 for sending mail (used on same host as
mailserver with both RSA and ECDSA certs, ports 25 and 587). When I
disable all TLS/SSL versions except TLSv1.2 in Postfix config, I cannot
send mails from Roundcube (SMTP Error: Authentication failure: STARTTLS
failed (Code: ) in /var/www/roundcube/program/lib/Roundcube/rcube.php on
line 1649 (POST
/?_task=mail&_unlock=loading1478615054443&_lang=en&_framed=1&_action=send)
) but can from desktop/mobile client.
Connection from Roundcube to IMAP server is always use TLSv1.2, external
servers (i.e. GMail) connect with TLSv1.2.
What could cause this behaviour? Is it possible to force TLSv1.2 for
SMTP?
--
Regards, Paul
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