My SyslogAppender succeeds in sending messages to the syslogd on my MacBook, but the messages themselves are "corrupt" the syslogd logs them. For example, a RollingFileAppender <appender name="DAILY_ROLLING" class="ch.qos.logback.core.rolling.RollingFileAppender"> <File>logs/dm.log</File> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>logs/dm.%d{yyyyMMdd}.log</FileNamePattern> </rollingPolicy> <encoder> <pattern>%d{yyyy-MM-dd'T'HH:mm:ss.SSS} [%p] %c{2} DSN:%X{X-HTC-DEVICE-SN} APV:%X{X-HTC-APP-VERSION} RID:%X{X-HTC-REQUEST-ID} - %m%n</pattern> </encoder> </appender> logs a message like... 2013-06-06T15:02:17.129 [INFO] Global$ DSN: APV: RID: - dm2-server starting But the SysLog appender dorks the message corrupting the %d timestamp and duplicating the level. My SyslogAppender is configured like... <appender name="SYSLOG" class="ch.qos.logback.classic.net.SyslogAppender"> <syslogHost>localhost</syslogHost> <facility>local4</facility> <suffixPattern>%d{yyyy-MM-dd'T'HH:mm:ss.SSS} %p %c{2} DSN:%X{X-HTC-DEVICE-SN} APV:%X{X-HTC-APP-VERSION} RID:%X{X-HTC-REQUEST-ID} - %m</suffixPattern> </appender> With the same log message appearing like... Jun 6 15:02:17 bobk-mbp.local 2013-06-06T15 <Info>: 02:17.129 INFO Global$ DSN: APV: RID: - dm2-server starting Where did the <Info> come from and what is it doing in the middle of logback's %d timestamp? Is this logback messing up or syslogd? Any recommendations on how to troubleshoot this? Bob