Hello,
I have an issue with postfix-2.10.2 and latest MS
windows/exchange/outlook: SSL connection cannot be negotiated with
default settings, there is an error in postfix log:
Oct 20 20:13:41 box postfix/smtp[21730]: warning: TLS library problem:
21730:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version
number:s3_pkt.c:337:
When TLS1.2 is disabled in postfix by
smtp_tls_protocols = !SSLv2, !TLSv1.2
smtp_tls_mandatory_protocols = !SSLv2, !TLSv1.2
smtpd_tls_protocols = !SSLv2, !TLSv1.2
smtpd_tls_mandatory_protocols = !SSLv2, !TLSv1.2
or in windows by turning off tls1.2 in schannel the problem disappears.
By brief investigation looks like schannel drops connection if first
tried cipher suite does not work and not try another ciphers
any solution ?
Best,
Deniss
