Problem
You need to know where to find email alert settings. You also want to understand if the Email Delivery Failed alert includes all failed emails, such as estimates.
Solution
Go to Settings > Integrations > Alerts.
Click Add.
Select Email Delivery Failed for the Type and set up the alert according to your preferences.
The Email Delivery Failed alert notifies you when an email status changes from Sent to Dropped, Bounced, or Failed. This includes all types of emails, including estimates.