<?xml version="1.0" encoding="utf-8"?>
<project name="pc" default="all" basedir="D:\jmeter-5.4">
    <tstamp>
        <format property="time" pattern="yyyyMMddhhmm" />
    </tstamp>
    <!-- Need to change to your own local Jmeter directory - >
    <property name="jmeter.home" value="D:\jmeter-5.4" />
    <! -- path to jmeter to generate result reports in jtl format -- >
    <property name="jmeter.result.jtl.dir" value="D:\jmeter-5.4\test\resultlog\jtl" />
    <! -- Path to the html formatted result report generated by jmeter -- >    
    <property name="jmeter.result.html.dir" value="D:\jmeter-5.4\test\resultlog\html" />
    <! -- the prefix of the generated report-->
    <property name="ReportName" value="TestReport" />
  
    <property name="jmeter.result.htmlName" value="${jmeter.result.html.dir}/${ReportName}${time}.html" />
    <property name="jmeter.result.jtlName" value="${jmeter.result.jtl.dir}/${test}${time}.jtl" />
    <!-- E-mail address for receiving test reports -->
    <property name="mail_from" value="[email protected]" />
    <property name="mail_to" value="[email protected]" />
    <!-- Computer Address -->
     <!-- <property name="ComputerName" value="jkqsh-l0285" />-->
    <target name="all">
        <antcall target="test" />
        <antcall target="report" />
        <antcall target="sendmail" />
    </target>
    <target name="test">
        <taskdef name="jmeter" classname="org.programmerplanet.ant.taskdefs.jmeter.JMeterTask" />
        <jmeter jmeterhome="${jmeter.home}" resultlog="${jmeter.result.jtlName}">
            <!-- Declare the scripts to be run." *.jmx" means all jmeter scripts in this directory -->
            <testplans dir="D:\jmeter-5.4\test\script" />
        </jmeter>
    </target>

    <path id="xslt.classpath">
        <fileset dir="${jmeter.home}/lib" includes="xalan*.jar"/>
        <fileset dir="${jmeter.home}/lib" includes="serializer*.jar"/>
    </path>

    <target name="report">
        <xslt
        classpathref="xslt.classpath"
            force="true"
        in="${jmeter.result.jtlName}" 
        out="${jmeter.result.htmlName}" 
        style="${jmeter.home}/extras/jmeter.results.shanhe.me.xsl">
            <param name="dateReport" expression="${time}"/>
    </xslt>
        <!-- Because the above report generation will not copy the related images to the target directory, so you need to copy them manually -->
        <copy todir="${jmeter.result.html.dir}">
            <fileset dir="${jmeter.home}/extras">
                <include name="collapse.png" />
                <include name="expand.png" />
            </fileset>
        </copy>
    </target>
    <!-- send files -->
    <target name="sendmail" >
        <mail mailhost="smtp.163.com"
            mailport="994"
            ssl="true"        
            user="${mail_from}"
            password="xxx"
            subject="Interface Test Report"
            from="${mail_from}"
            >
            <to address="${mail_to}"/>
            <message>For a detailed report, please see the attachment</message>
              <attachments>
                <fileset dir="${jmeter.result.html.dir}"> 
                  <include name="${ReportName}${time}.html"/>
                </fileset> 
              </attachments>
        </mail>
    </target>

</project>

Solution:

Call 163 mailbox server to send mail. We need to start POP3/SMTP service. At this time, 163 mail will let us set the client authorization code. This authorization code can successfully send mail by replacing passwd in the code part above