Mailing List CGatePro@mail.stalker.com Message #106413
From: Jona Tallieu (T & T nv) <Junk@tnt.be>
Subject: none of client TLS cipher methods is supported
Date: Wed, 17 May 2017 10:34:54 +0200
To: CommuniGate Pro Discussions <CGatePro@mail.stalker.com>
X-Mailer: Apple Mail (2.3273)
Dear,

We are having problems with receiving mail from yahoo.com on a CGP 5.1.16 running on Limux (old version, I know…).

We get the error:
SMTPI-393710(sonic319-29.consmr.mail.ir2.yahoo.com) failed to accept a secure connection for ‘mail.ourserver.com’. Error Code=none of client TLS cipher methods is supported

Any ideas?

When I do:
openssl s_client -connect mail.ourserver.com:465 -showcerts

I do get an error:

CONNECTED(00000003)
depth=3 /C=US/O=The Go Daddy Group, Inc./OU=Go Daddy Class 2 Certification Authority
verify error:num=19:self signed certificate in certificate chain
verify return:0

But I don not see a self signed cert in the CGP settings?

At the end I get:

---
No client certificate CA names sent
---
SSL handshake has read 4908 bytes and written 448 bytes
---
New, TLSv1/SSLv3, Cipher is DES-CBC3-SHA
Server public key is 2048 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
SSL-Session:
    Protocol  : TLSv1
    Cipher    : DES-CBC3-SHA
    Session-ID: 001EDF8B591C0931FB25F81A34F47DEC4B8CE3DAE99FA59C372765880651FCD6
    Session-ID-ctx: 
    Master-Key: 77F69A21EFE0CBDC769564062E5E56B43FE22F32939F1EC3D213C896361AB8B2648B4685F75B5C93560B6D4898D7E03C
    Key-Arg   : None
    Start Time: 1495009568
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)

But maybe this is unrealted to the yahoo.com TLS cipher methods problem we are having?

Seems to be isolated to mails from yahoo. Any way to turn off TLS just for yahoo?

Any other ideas?

Thanks!


J.


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