Seems like a great plugin. I just need to make sure I’m setting it up correctly: Is everything I need to do to install it and enter my SMTP details? Or do I also need to tell WordPress in some way to use this plugin instead of the built in way? (It’s a little confusing with the info “Configure the wp_mail() function to use SMTP instead of the PHP mail() function.” because it can be understood as that I as a user need to configure something in WordPress.
And how do I know that the plugin is used rather than the built in way? When I check the source of two e-mails (one sent before installing the plugin and one after), they look similar to me. They both refer to PHPMailer as the X-Mailer (even the test e-mails do).