Hi, the plugin sends emails with the wp_mail() function. So you could to follow the instructions given here:

wp_mail()

You could hook into the filters wp_mail_from and wp_mail_from_name somewhere in your functions.php. Here’s how to do this:

https://codex.wordpress.org/Plugin_API/Filter_Reference/wp_mail_from

The above will affect all email sent with wp_mail() from your site.

I will make a note to make it easier to set an originator for the plugin via an admin option in the next release.

kind regards