* comment: Does it send mock mail? (true: no send actually, logging only)
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getMailSendMock();

    /**
     * Is the property for the key 'mail.send.mock' true? <br>
     * The value is, e.g. true <br>
     * comment: Does it send mock mail? (true: no send actually, logging only)

        assertEquals("0", fessEnv.getTimeAdjustTimeMillis());
        assertEquals(Long.valueOf(0), fessEnv.getTimeAdjustTimeMillisAsLong());

        // Test getMailSendMock and isMailSendMock
        assertEquals("true", fessEnv.getMailSendMock());
        assertTrue(fessEnv.isMailSendMock());

        // Test getMailSmtpServerMainHostAndPort
        assertEquals("localhost:25", fessEnv.getMailSmtpServerMainHostAndPort());