I have Jenkins version 1.480.3 installed on my machine and Email-Extention Plugin 2.30.2.
Test mail from \"Manage Jenkins\" section works fine. When I add editable email
Wasted few days.
Also tried to Downgrade the email-ext plugin to 2.25 but this Doesn't help.
Test mail sended, In Console Log was Sending email to: mymail But stiil have no messages.
I found solution that help me....
I used gmail. So I Verifeid my gmail account via cellphone, than I fill Security Settings and gave Access to my account from unreliable sources.
Then I fill that mail into Use SMTP Authentication in Global Settings.
That worked for me :)