Groovy Listener react to subject of message ?

[Marcin Beczynski]

Hey,
I had to write a custom listener what will react to message subject email message. for example customer send email with issueKey and operation name I would like catch this operation name but not really know how to handled it 

BR 

[Alexey Matveev]

Hello,

Do you want to write a listener or a mail handler? If you write a listener, then you should attach this listener to the Create Issue Event and put all your logic in this listener. But you will not be able to distinguish, if an issue is created by mail or somehow else.

[Marcin Beczynski]

Could be mail handler but I'm stuck with this tutorial (creating a custom mail handler) and don't know how to force this to catch all issue not only what will put intro configuration