use own test command

collections/_documentation/emails.md

@@ -37,7 +37,7 @@ You get all the above settings from your email provider. Ports and encryption ca
 
 ## Testing emails
 
-You can run `bin/console mailer:test admin@example.com --from=test@example.com` to verify if the connection string is working.
+You can run `bin/console kimai:mail:test --to=recipient@example.com --from=sender@example.com` to verify if the connection string is working.
 
 You have to replace:
 - `[email protected]` with your own email address to receive the test email