Reply To address is incorrect

[adz1111]

Hi - I have configured FluentSMTP to work with mailgun - it all actually works fine with the exception that any email sent has an incorrect reply-to email address (and name) - although the From name and address is correct..

I know what it is using for the email address and friendly name, but I have no idea why it's using those (it's using the WP Site Title as the friendly name and the WP admin's email address as the return email address). See here:

Yet in the plugin's config, there is no mention of that name/email address. I have also tried every combination of checking/unchecking both the "set return path" and "force sender name" checkboxes - all yield the same result. See config here (with both boxes ticked in this case):

Any ideas please? TIA.

Adz