Hi All,
Am 19.01.2015 um 22:55 schrieb Darren Pilgrim:
On 1/18/2015 12:45 AM, Robert Schetterer wrote:
Am 16.01.2015 um 12:24 schrieb Oliver Welter:
Hi Folks,
after adding TLSv1.2 to by TLS options a lot of Outlook users complaint about connection errors, openssl s_client and Thunderbird works fine.
I found some posts about this but none of them had a real solution on this - I meanwhile disabled TLSv1.2 which made the Outlook users happy.
I run dovecot 2.2.13, OpenSSL 1.0.1j 15 Oct 2014
ssl_cert = </var/qmail/control/servercert.pem ssl_cipher_list = ALL:!EXPORT:!LOW:!MEDIUM:!aNULL:+RC4:@STRENGTH ssl_dh_parameters_length = 2048 ssl_key = </var/qmail/control/servercert.pem ssl_protocols = !SSLv2 !TLSv1.2
The certificate is from Comodo using sha256.
I was not able to track it down exactly but it looks like the problem was a sha1 signed certificate in the chain. After exchanging that with the matching 384bit one, the problems are gone.
Oliver
-- Protect your environment - close windows and adopt a penguin!