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copied!<p>It sounds like your mail server is not signed by <code>Go Daddy Class 2 Certification Authority</code>, but is actually signed by one of their intermediate certificate authorities. You will need to verify this for yourself. Assuming this is the case...</p> <p>In theory, your software should work - since the intermediate certificate is signed by the class 2 authority and you have the class 2 authority in the default JDK certificate store. However, I have found that it just does not work unless you also add the intermediate certificate to your certificate store. Here is a link to a blog post describing a similar experience:</p> <p><a href="http://drcs.ca/blog/adding-godaddy-intermediate-certificates-to-java-jdk/" rel="nofollow">http://drcs.ca/blog/adding-godaddy-intermediate-certificates-to-java-jdk/</a></p> <p>Here is a direct link to more GoDaddy intermediate certificates: <a href="https://certs.godaddy.com/anonymous/repository.pki" rel="nofollow">https://certs.godaddy.com/anonymous/repository.pki</a></p> <p>I cannot advise on exactly which certificate you must add - it depends on which CA is used in your mail server.</p> <p>[update]</p> <p><code>is there a way to do this programmically?</code></p> <p>Maybe. Depends on what you want to do. I have used the <code>java.security.KeyStore</code> class to automatically update a private keystore directly from Java code without using <code>keytool</code>. It is conceptually simple - load the keystore from a file, read the new certificate, add it to the keystore and then write out the keystore to new file. However it takes a while to get the details right and it may not be worth the trouble just to import a single certificate.</p> <p>Still, it is interesting to try. Checkout <a href="http://docs.oracle.com/javase/7/docs/api/java/security/KeyStore.html" rel="nofollow">KeyStore JavaDoc</a> and read up on the <code>load</code>, <code>store</code> and <code>setCertificateEntry</code> methods.</p>

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