The Email-ext plugin fails to send mail notification after a build. I have the following error: 

"MessagingException message: failed to connect, no password specified?"

I've tried different things regarding existing issue:

• Send to the Recipient List in the Trigger option
• Change SMTP port to 25, 465, 587
• Play with the "-Dmail.smtp.starttls.enable" configuration in jenkins.xml

None of these manage to solve the issue.

However, the test with the basic mailer plugin works perfectly.

Maybe it is stupid, but I think I don't need ssl encryption (working on lan), and that's why I have uncheck "ssl" configuration. Also delete "-Dmail.smtp.starttls.enable=true" in the jenkins.xml.

Any ideas ?

Environment:

JavaMail version: 1.4.4
Jenkins version: 2.190.3
Email Extension Plugin version: 2.68
Mailer Plugin version: 1.29