You tried to send a test email through Tout but it is saying that you need to set up an SMTP server. The email identity set-up has the Tout servers enabled in my account.
We no longer offer ToutApp Default delivery channel. Customers can either use office365, gmail, or a custom delivery channel (sparkpost/sendgrid). The easiest way is to connect to their gmail account and use gmail as the delivery channel.
Here are some docs that will help with set up as well as basic information around smtp servers & delivery channels: