diff --git a/slf4j-logback/src/main/resources/logback-email.xml b/slf4j-logback/src/main/resources/logback-email.xml
new file mode 100644
index 0000000..ce327f2
--- /dev/null
+++ b/slf4j-logback/src/main/resources/logback-email.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration debug="true">
+
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <layout class="ch.qos.logback.classic.PatternLayout">
+            <Pattern>
+                %d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n
+            </Pattern>
+        </layout>
+    </appender>
+
+    <appender name="EMAIL" class="ch.qos.logback.classic.net.SMTPAppender">
+        <smtpHost>smtp.mailgun.org</smtpHost>
+        <smtpPort>25</smtpPort>
+        <username>123</username>
+        <password>123</password>
+        <to>TO_EMAIL</to>
+        <to>RO_ANOTHER_EMAIL</to>
+        <from>FROM_EMAIL</from>
+        <subject>TESTING: %logger{20} - %m</subject>
+
+        <layout class="ch.qos.logback.classic.html.HTMLLayout"/>
+
+        <cyclicBufferTracker class="ch.qos.logback.core.spi.CyclicBufferTracker">
+            <!-- send just one log entry per email -->
+            <bufferSize>1</bufferSize>
+        </cyclicBufferTracker>
+
+        <!-- default asynchronousSending = true -->
+        <!-- for single main() testing, turn off to avoid system exit without sending email-->
+        <asynchronousSending>false</asynchronousSending>
+
+    </appender>
+
+    <logger name="com.mkyong" level="error" additivity="false">
+        <appender-ref ref="EMAIL"/>
+    </logger>
+
+    <root level="error">
+        <appender-ref ref="CONSOLE"/>
+    </root>
+
+</configuration>
+
diff --git a/slf4j-logback/src/main/resources/logback.xml b/slf4j-logback/src/main/resources/logback.xml
new file mode 100644
index 0000000..ccf6010
--- /dev/null
+++ b/slf4j-logback/src/main/resources/logback.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration debug="true">
+
+    <property name="HOME_LOG" value="logs/app.log"/>
+
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <layout class="ch.qos.logback.classic.PatternLayout">
+            <Pattern>
+                %d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n
+            </Pattern>
+        </layout>
+    </appender>
+
+    <appender name="FILE-ROLLING" class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>${HOME_LOG}</file>
+
+        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
+            <fileNamePattern>logs/archived/app.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
+            <!-- each archived file, size max 10MB -->
+            <maxFileSize>10MB</maxFileSize>
+            <!-- total size of all archive files, if total size > 20GB, it will delete old archived file -->
+            <totalSizeCap>20GB</totalSizeCap>
+            <!-- 60 days to keep -->
+            <maxHistory>60</maxHistory>
+        </rollingPolicy>
+
+        <encoder>
+            <pattern>%d %p %c{1.} [%t] %m%n</pattern>
+        </encoder>
+    </appender>
+
+    <!-- https://logback.qos.ch/manual/appenders.html#AsyncAppender -->
+    <!-- AsyncAppender will drop events of level TRACE, DEBUG and INFO if its queue is 80% full -->
+    <appender name="ASYNC" class="ch.qos.logback.classic.AsyncAppender">
+        <appender-ref ref="FILE-ROLLING" />
+        <!-- defaulr 256 -->
+        <queueSize>512</queueSize>
+    </appender>
+
+    <logger name="com.mkyong" level="debug" additivity="false">
+        <appender-ref ref="ASYNC"/>
+        <appender-ref ref="CONSOLE"/>
+    </logger>
+
+    <root level="error">
+        <appender-ref ref="CONSOLE"/>
+    </root>
+
+</configuration>
+