Log4j.properties code:
log4j.rootcategory=debug, console, logfile, Errfile
log4j.appender.console= Org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.patternlayout
log4j.appender.console.layout.conversionpattern=[mymail]%d%p%t%c-%m%n
#
# logfile
#
Log4j.appender.logfile=org.apache.log4j.rollingfileappender
Log4j.appender.logfile.append=false
Log4j.appender.logfile.file=i18n-tools.log
LOG4J.APPENDER.LOGFILE.MAXFILESIZE=1MB
Log4j.appender.logfile.layout=org.apache.log4j.patternlayout
log4j.appender.logfile.layout.conversionpattern=%d%p [%c]-%m%n
#
# errfile
#
Log4j.appender.errfile=org.apache.log4j.rollingfileappender
Log4j.appender.errfile.threshold=error
Log4j.appender.errfile.append=false
Log4j.appender.errfile.file=i18n-tools-err.log
LOG4J.APPENDER.ERRFILE.MAXFILESIZE=1MB
log4j.appender.errfile.layout=org.apache.log4j.patternlayout
log4j.appender.errfile.layout.conversionpattern=%d%p [%c]-%m%n