v6.5.1

docs/versioned_docs/version-6.5/testing.md

@@ -1975,6 +1975,16 @@ console.log(testCacheClient.storage)
 This is mainly helpful when you are testing for a very specific value, or have edgecases in how the serialization/deserialization works in the cache.
 
 
+## Testing Mailer
+
+If your project uses [RedwoodJS Mailer](./mailer.md) to send emails, you can [also write tests](./mailer.md#testing) to make sure that email:
+
+* is sent to an sandbox inbox
+* renders properly
+* sets the expected to, from, cc, bcc, subject attributes based on the email sending logic
+* checks that the html and text content is set correctly
+
+Since these tests send mail to a sandbox inbox, you can be confident that no emails accidentally get sent into the wild as part of your test or CI runs.
 
 
 ## Wrapping Up