+++ This bug was initially created as a clone of Bug #25355 +++ If my application sends out sensitive info about a severe/fatal application state via log4j, I don't want eavesdropping attackers to learn about that! see also Bug 24969 for an RFE re SMTP AUTH I am trying to set SMTPProtocol using log4j.properties based on log4j1.2-16 lib. But the property seems not to be recognized: My log4j.properties: ----------------------------------------------------------- log4j.appender.emailOut=org.apache.log4j.net.SMTPAppender #log4j.appender.emailOut.Threshold=INFO # Debugging log4j.appender.emailOut.SMTPDebug=true log4j.appender.emailOut.SMTPHost=smtp.gmail.com log4j.appender.emailOut.SMTPProtocol="smtps" log4j.appender.emailOut.SMTPPort=465 log4j.appender.emailOut.BufferSize=20 #log4j.appender.emailOut.To=admin@econoinfo.com.br log4j.appender.emailOut.To=mailer.econoinfo@gmail.com log4j.appender.emailOut.layout=org.apache.log4j.PatternLayout log4j.appender.emailOut.layout.ConversionPattern=%d{ISO8601} %5p [%t](%F:%L)- %m%n ----------------------------------------------------------- The errors resulted: ----------------------------------------------------------- log4j:WARN No such property [SMTPProtocol] in org.apache.log4j.net.SMTPAppender. log4j:WARN No such property [SMTPPort] in org.apache.log4j.net.SMTPAppender. ----------------------------------------------------------- Also, there is a minor typo error in the file instructing to set smtpProtocol to "smpts" instead of "smtps".