assertEquals("localhost", config.getMailHostname());
    }

    // Test with different from names
    public void test_differentFromNames() {
        String[] fromNames = { "Administrator", "Support Team", "No Reply", "Test User" };

        for (String name : fromNames) {
            ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
                private static final long serialVersionUID = 1L;

                @Override

                props.setProperty(FessEnv.MAIL_RETURN_PATH, "no-reply******@****.***");
                return props;
            }
        };

        assertEquals("smtp-relay.example.com:465", specialMailEnv.getMailSmtpServerMainHostAndPort());
        assertEquals("[テスト環境]", specialMailEnv.getMailSubjectTestPrefix());
        assertEquals("no-reply******@****.***", specialMailEnv.getMailReturnPath());
    }

    /** Configuration key for Azure AD client ID. */
    protected static final String AZUREAD_CLIENT_ID = "aad.client.id";

    /** Configuration key for Azure AD reply URL. */
    protected static final String AZUREAD_REPLY_URL = "aad.reply.url";

    /** Session attribute key for storing Azure AD states. */
    protected static final String STATES = "aadStates";

    /** OAuth2 state parameter name. */