Select group for Mass Emails

Using my Dolibarr CRM/SRM Modules
1

15.0.3 Dolibarr Version
7.4.30 PHP Version

Dear all,
in our company we have some departments, and any week we need to send a specific email to each one.
Can some one help me to modify the code (send email module) for having the possibility to select a specific group of users from row “Users with Email”?

2

Hi Denis,
if you contact me privately, we can see your problem together