Add custom post type to %title% of emails sent via Subscribe by Email

I’m trying to edit the files to allow the following.

I have a few different custom post types that I want to send emails to subscribers once someone post in the categories. For example, we have “Galleries” and “Notices”. I want the title of the email and title of the “body” of the email to be “Blog Name : post_type” So the output would be “City of Hanahan : Notices” and then display the notice. Or “City of Hanahan : Gallery” and then display the gallery.

I hope that makes sense.