PASS: SMTP acceptance succeeds
PASS: SMTP password decoded exactly as UVdesk does
PASS: Saved password restored after sending
PASS: Repeated tests do not double-decode the password
PASS: Only the requested recipient receives the test
PASS: Configured sender is used
PASS: Original timeout restored
PASS: Zero recipients is a failure
PASS: Authentication error is useful and credentials are not exposed
PASS: Actual exception class and SMTP error are displayed
PASS: Saved password restored after failure
PASS: SES identity rejection is explained
PASS: Connection failure is explained
PASS: Original TLS diagnostic is preserved
PASS: Disabled transport cannot report success
PASS: Existing settings template resolves to the application override