Hi,
I am using logback 1.0.9 (along with slf4j 1.7.2); I have defined the following appender:
<appender name="EMAIL" class="ch.qos.logback.classic.net.SMTPAppender">
        <!-- deny all events with a level below ERROR -->
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
        <smtpHost>email-smtp.us-east-1.amazonaws.com</smtpHost>
        <username>AKIAJI6XLSOAQX3IW6HQ</username>
        <password>AuSWMdcNObKqGGT550SR/6vDrgh50vxgFrqZHwR2tTED</password>
        <SSL>true</SSL>
        <to>hanriseldon@gmail.com</to>
        <from>info@applieddatalabs.com</from>
        <subject>${launchpad.origin}: %logger{20} - %m</subject>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>prov - |${launchpad.origin}| %date [%thread] %-5level %logger{36} - %message%n</pattern>
        </encoder>
        <cyclicBufferTracker class="ch.qos.logback.core.spi.CyclicBufferTrackerImpl">
            <bufferSize>1000</bufferSize>
        </cyclicBufferTracker>
    </appender>