java邮件程序不再发送邮件了

Question

我有一个java程序，它向用户发送邮件。一周后，邮件不再发送。我没有更改任何内容，但现在我遇到了以下错误：

connexion failed: Exception reading response;
  nested exception is:
    javax.net.ssl.SSLException: java.lang.RuntimeException: Could not generate DH keypair
Exception in thread "main" java.lang.RuntimeException: javax.mail.MessagingException: Exception reading response;
  nested exception is:
    javax.net.ssl.SSLException: java.lang.RuntimeException: Could not generate DH keypair
    at Launcher$Connexion.<init>(Launcher.java:33)
    at Launcher.main(Launcher.java:52)
Caused by: javax.mail.MessagingException: Exception reading response;
  nested exception is:
    javax.net.ssl.SSLException: java.lang.RuntimeException: Could not generate DH keypair
    at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1407)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1205)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:322)
    at javax.mail.Service.connect(Service.java:236)
    at javax.mail.Service.connect(Service.java:137)
    at Launcher$Connexion.<init>(Launcher.java:28)

我联系了FASTHOME（邮件服务器），他们说不安全证书是自签名的，直到2021才到期。p>

所以我不知道问题出在哪里