Yes. Network-activate it and every site is set up, including sites added later. Each site keeps its own settings and its own log, and is judged by its own address when it decides whether it is a copy.
Still stuck? Ask the developers who wrote it. We aim to reply within one business day.
![The Send a test screen of Email Delivery in WordPress admin. A red box reads It did not go. SMTP Error: Could not authenticate. Below, a panel headed What the mail server said, noting it is safe to paste into a support request, shows the full conversation with smtp.sendgrid.net, the sign-in lines replaced by [credentials hidden], ending in 535 Authentication failed: The provided authorization grant is invalid, expired, or revoked.](https://www.traslatability.com/wp-content/themes/traslatability/assets/screens/email-delivery-by-traslatability/crops/01-test-transcript-m.webp?ver=1792726162)