Hi,

I'm trying to enable TLS for outgoing mail on port 25. When it's enabled SD plus is unable to send messages. I've verified that TLS is working on our mailserver.

In the SDP logs I see the following:
[SYSOUT]|[INFO]|[29]|: Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path

When our mailserver communicates to SDP it reports:
TLS/SSL Problem: Unable to negotiate TLS cipher [162]

It seems that for some reason the certification path cannot be verified. The certificate we use is an offical one, so it should have the CA root cert in the store. I'm not exactly sure, but I don't think it uses the Windows certificate store, but instead the one that comes with the Java installation.
I checked the Java cacerts store and the root certificate seems to be there. I even tried adding our certificate to that store using the keytool utility, but no luck.

Anyone know how to resolve this issue?

Best,

Iwan