<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-mail</artifactId>
  <version>${spring-boot.version}</version>
  <scope>provided</scope>
</dependency>

spring.mail.host=smtp.qq.com
spring.mail.username=你的qq號碼@qq.com
spring.mail.password=qq郵箱開啟SMTP提供的授權(quán)碼（注意：不是你的qq郵箱密碼）#下面一般不用動
spring.mail.default-encoding=${spring.http.encoding.charset}
spring.mail.properties.mail.smtp.connectiontimeout=5000 
spring.mail.properties.mail.smtp.timeout=3000
spring.mail.properties.mail.smtp.writetimeout=5000
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

@Autowired
        private JavaMailSender mailSender;
        
        @Value("${spring.mail.username}")
        private String from;


SimpleMailMessage smm = new SimpleMailMessage();
            smm.setFrom(from);
            smm.setTo("發(fā)送方郵件地址");
            smm.setSubject("springboot測試郵件");
            smm.setText("簡單文本郵件測試發(fā)送！");
            mailSender.send(smm);