Hello, I'm having problems trying to use the gmail example provided here: http://logback.qos.ch/manual/appenders.html

My config is:

...
    <appender name="email" class="ch.qos.logback.classic.net.SMTPAppender">
        <SMTPHost>smtp.gmail.com</SMTPHost>
        <SMTPPort>465</SMTPPort>
        <SSL>true</SSL>
        <Username>yyy@gmail.com</Username>
        <Password>xxx</Password>
        <To>zzz@gmail.com</To>
        <From>aaa@no-reply.com</From>
        <Subject>APP ERROR: %class{20} - %m</Subject>
        
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
          <level>ERROR</level>
        </filter>
        <layout class="ch.qos.logback.classic.PatternLayout">
          <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{1} - %msg%n</pattern>
        </layout>
    </appender>
...

... and I'm getting this in the log:

19:41:03,031 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@38:16 - no applicable action for [SMTPPort], current pattern is [[configuration][appender][SMTPPort]]
19:45:30,244 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@39:11 - no applicable action for [SSL], current pattern is [[configuration][appender][SSL]]
19:45:40,367 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@40:16 - no applicable action for [Username], current pattern is [[configuration][appender][Username]]
19:45:40,740 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@41:16 - no applicable action for [Password], current pattern is [[configuration][appender][Password]]

Any suggestion on what could be wrong?
Thanks,
Federico