Send custom email on selecting Group value in custom Group Picker on Transition screen in JIRA DC

[Digvijay Singh Gehlot]

Hi Community,

I have added a custom Group Picker field on a transition screen.

I want to send a custom email after currentUser selects the value in custom Group Picker field and then clicks on Transition Name button on Transition screen.

And is there a way to send individual emails to each user (present in Group) after performing the above action? 

How can we configure this in JIRA Data-center by using either scriptrunner, post-functions, JMWE app, or JIRA automation?

As I am new to customizations in JIRA, it would be a great learning for me.

Thank you.

[Stefan Salzl]

duplicates

https://community.atlassian.com/t5/App-Central-questions/Send-custom-email-on-selecting-Group-value-in-custom-Group/qaq-p/2745114