Change the subject line of the emails

Hi folks,

I just want to change the subject line of the send emails and not the content.

I have seen the documentation about email templating ( https://stackideas.com/docs/easysocial/administrators/templating/customizing-email-template), but I do not see any code line where the email subject is set.

Is this possible in any way?

For example a user (John Doe) posts an announcement in a group, the subject of the email is actually "John Doe posted an announcement in the group...". It would be nice for my members if the subject would be the subject of the announcement.
There are some other emails where I want to change the subject too.

Thanks for your help!

Regards,
Marco