log4j SMTPAppender is not sending email

I am using Mirth Connect v3.0.1 and I would like to set up log4j to email any errors that occur. I have set up the appender in the log4j.properties file:

Code:

---

# sample properties to initialize log4j

log4j.rootLogger = ERROR,stdout,fout,smtp



# stdout appender

log4j.appender.stdout = org.apache.log4j.ConsoleAppender

log4j.appender.stdout.layout = org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern = %-5p %d [%t] %c: %m%n



# file appender

dir.logs = logs

log4j.appender.fout = org.apache.log4j.DailyRollingFileAppender

log4j.appender.fout.File = ${dir.logs}/mirth.log

log4j.appender.fout.DatePattern = '.'yyyy-MM-dd

log4j.appender.fout.layout = org.apache.log4j.PatternLayout

log4j.appender.fout.layout.ConversionPattern = %-5p %d [%t] %c: %m%n



# smtp appender

log4j.appender.smtp = org.apache.log4j.net.SMTPAppender

log4j.appender.smtp.SMTPHost = localhost

log4j.appender.smtp.From = mirth@server.com

log4j.appender.smtp.To = ops@server.com

log4j.appender.smtp.Subject = Test

log4j.appender.smtp.BufferSize = 1

log4j.appender.smtp.Threshold = WARN

log4j.appender.smtp.layout = org.apache.log4j.PatternLayout

log4j.appender.smtp.layout.ConversionPattern = %-5p %d [%t] %c: %m%n



# splash screen

log4j.logger.com.mirth.connect.server.Mirth = INFO



# Mirth Connect channel logging

log4j.logger.transformer = DEBUG

log4j.logger.preprocessor = DEBUG

log4j.logger.postprocessor = DEBUG

log4j.logger.deploy = DEBUG

log4j.logger.shutdown = DEBUG

log4j.logger.filter = DEBUG

log4j.logger.db-connector = DEBUG

log4j.logger.js-connector = DEBUG

log4j.logger.attachment = DEBUG

log4j.logger.batch = DEBUG

log4j.logger.response = DEBUG



# SQL Logging

log4j.logger.java.sql = ERROR

---

However, I am not receiving emails from my sample channel, although the errors do appear in the mirth.log:



ERROR 2014-11-26 16:15:51,903 [pool-3-thread-1] deploy: This is a test

FATAL 2014-11-26 16:15:52,435 [pool-3-thread-1] js-connector: test reader



In other applications on this server I have log4j set up to send emails and it works OK. I also have Mirth sending emails from the channels and again that all works OK. It's just from log4j that nothing is happening, and there aren't even any errors being produced.



Is anyone else using the SMTPAppender in log4j with Mirth?

log4j SMTPAppender is not sending email