java - Logback SMTPAppender 不发送电子邮件

Question

我正在尝试使用 Logback 登录我的 Java 应用程序。我相信我已经正确配置了它，但是当记录错误时

INFO in ch.qos.logback.classic.net.SMTPAppender[EMAIL] - About to send out SMTP message "Testing Main" to [XXXX@optonline.net]

被打印到控制台，之后没有任何其他打印，并且永远不会收到电子邮件。如果我在配置中输入无效的 smtp 主机或用户名/密码，它会在尝试发送时立即失败，因此它正在建立连接。

我的 POM:

 <repositories>
    <repository>
    <id>Java.Net</id>
    <url>http://download.java.net/maven/2/</url>
    </repository>
  </repositories>
  <dependencies>

            <dependency>
                <groupId>javax.activation</groupId>
                <artifactId>activation</artifactId>
                <version>1.1.1</version>
            </dependency>


             <dependency>
                 <groupId>javax.mail</groupId>
                 <artifactId>mail</artifactId>
                 <version>1.4.7</version>
             </dependency>

            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>1.1.1</version>
            </dependency>
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-classic</artifactId>
                <version>1.1.1</version>
            </dependency>
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>1.7.6</version>
            </dependency>


            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>jcl-over-slf4j</artifactId>
                <version>1.7.6</version>
            </dependency>


         </dependencies>

logback.xml

<configuration>
    <!-- dump status message on the console as they arrive -->
    <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />

    <appender name="EMAIL" class="ch.qos.logback.classic.net.SMTPAppender">
        <smtpHost>mail.optonline.net</smtpHost>
        <username>xxxxx</username>
        <password>xxxxxx</password>
        <smtpPort>587</smtpPort>
        <to>xxxxx@optonline.net</to>
        <from>xxxxx@optonline.net</from>
        <subject>Testing %logger
        {20}

        - %m</subject>

        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>%d
                {HH:mm:ss.SSS}

                [%thread] %-5level %logger
                {1}

                -%msg%n
            </pattern>
        </layout>
    </appender>

    <root level="info">
        <appender-ref ref="EMAIL" />
    </root>
</configuration>

控制台

10:45:44,596 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy]
10:45:44,596 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
10:45:44,596 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/C:/Users/xxxxx/workspace/logback-test/target/classes/logback.xml]
10:45:44,650 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
10:45:44,658 |-INFO in ch.qos.logback.core.joran.action.StatusListenerAction - Added status listener of type [ch.qos.logback.core.status.OnConsoleStatusListener]
10:45:44,673 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.classic.net.SMTPAppender]
10:45:44,688 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [EMAIL]
10:45:44,765 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO
10:45:44,765 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [EMAIL] to Logger[ROOT]
10:45:44,766 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
10:45:44,767 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@ddc652f - Registering current configuration as safe fallback point
10:45:44,774 |-INFO in ch.qos.logback.classic.net.SMTPAppender[EMAIL] - SMTPAppender [EMAIL] is tracking [1] buffers
exiting
10:45:44,791 |-INFO in ch.qos.logback.classic.net.SMTPAppender[EMAIL] - About to send out SMTP message "Testing Main" to [xxxxx@optonline.net]
10:45:44,791 |-INFO in ch.qos.logback.classic.net.SMTPAppender[EMAIL] - About to send out SMTP message "Testing Main" to [xxxxx@optonline.net]

这是运行时产生测试错误的代码

logger.error("Entering app");
logger.error("exiting app");

System.out.println("exiting");

如果能帮助调试这个问题，我们将不胜感激谢谢

Answer 1

我也遇到过这个问题并找到了解决方案。要运行上面的代码，您必须对配置进行一些更改:

1. 添加<STARTTLS>true</STARTTLS>
2. 添加<asynchronousSending>false</asynchronousSending>