<appender name="EMAILDEV" class="ch.qos.logback.classic.net.SMTPAppender">
<smtpHost>${smtpHost}</smtpHost>
<smtpPort>${smtpPort}</smtpPort>
<username>${username}</username>
<password>${password}</password>
<SSL>${SSL}</SSL>
<asynchronousSending>false</asynchronousSending>
<to>${email_to_dev}</to>
<from>${email_from}</from>
<subject>${email_subject_dev}</subject>
<layout class="ch.qos.logback.classic.html.HTMLLayout" >
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS}[%thread] %-5level %logger{50} - %msg%n</pattern>
</layout>
<!-- <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>WARN</level>
</filter> -->
<cyclicBufferTracker class="ch.qos.logback.core.spi.CyclicBufferTracker">
<!-- send just one log entry per email -->
<bufferSize>1</bufferSize>
</cyclicBufferTracker>
</appender>

logger.warn("TEst");