What is the difference between FnSMTP with other notification add-ons?
The FnSMTP has the ability to send notification emails via the SMTP protocol, so the amount of mail sent (daily) depends only on the sending server.
Is FnSMTP free?
The FnSMTP has a free version. Compared to the Pro version, the free version only differs, with an ad link at the bottom of the email.
I still keep in touch with you, you still keep connecting with your clients