sendmail error: "java.lang​.RuntimeEx​ception: Could not generate DH keypair"

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I'm running Matlab R2012b and have been using the sendmail command for years using the same server and email settings. Suddenly, out of the blue, sendmail gives me the error: "java.lang.RuntimeException: Could not generate DH keypair". Even the simplest command:
produces this error. I have not changed the Java version (1.6.0_22-b04). What can be the problem?

Answers (1)

Walter Roberson
Walter Roberson on 31 Jan 2018
Edited: Walter Roberson on 31 Jan 2018
Fredrik Gustavsson
Fredrik Gustavsson on 31 Jan 2018
Installing Java 7 resolves the sendmail problem (I went back to the original security providers) but of course introduces other issues with for instance some GUI components since R2012b is shipped with Java 6 (v1.6.0_17 to be precise). Stuck in the gap between old and new. Still in total surprise why sendmail suddenly became impaired to send emails. Actually, we have 60 customers using our deployed software that have lost some vital functionality with this. Mathworks say they can't really help me because this is a Java issue. Well yes but if they have based their function on Java, it should also be a Matlab issue.

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