I config a SMTPAppender

<appender name="EMAIL" class="ch.qos.logback.classic.net.SMTPAppender">
<Subject>TESTING: %logger

- %m</Subject>

<SMTPHost>$

</SMTPHost>
<To>$

</To>
<From>$

</From>
<charsetEncoding>utf-8</charsetEncoding>
<includeCallerData>true</includeCallerData>

<layout class="ch.qos.logback.classic.PatternLayout">
<pattern>%d

%-5level (%F:%L) %method() - %m%n</pattern>
</layout>

<cyclicBufferTracker class="ch.qos.logback.core.spi.CyclicBufferTracker">
<bufferSize>2</bufferSize>
</cyclicBufferTracker>
</appender>

I set bufferSize value =2

But when i run my java code:

public class HelloWorldTest{

private static final Logger log = LoggerFactory.getLogger(HelloWorldTest.class);

@Test
public void testHelloWorldTest() throws InterruptedException{
for (int i = 0; i < 3; ++i)

Thread.sleep(TimeInterval.SECONDS_PER_MINUTE * 1000 / 1);
}
}

I got three emails,and each email show content:

2015-04-26 23:38:56 ERROR (HelloWorldTest.java:40) testHelloWorldTest() - hello world

I just want to got two email,

first one content show 2 line infos:

2015-04-26 23:38:56 ERROR (HelloWorldTest.java:40) testHelloWorldTest() - hello world
2015-04-26 23:38:56 ERROR (HelloWorldTest.java:40) testHelloWorldTest() - hello world

second one,content show just 1 line infos:
2015-04-26 23:38:56 ERROR (HelloWorldTest.java:40) testHelloWorldTest() - hello world

The SMTPAppender's cyclicBufferTracker bufferSize param does't work