When people subscribe to the newsletter, the email is generated to the website administrator and the From email address says firstname.lastname@example.org instead of email@example.com. I have a dedicated server and do not use SMTP. I just use the WordPress and Server email functionality.
Since, then I added the SMTP settings and that did not correct the Sender or email address displaying on the subscription emails. So, it must be something else. Thanks for any ideas on how to solve this.