jmeter官方给出了说法:
JMeter has limited Email capabilities. It can send email based on test results, and has a POP/IMAP sampler. It does not currently support SMTP sampling. To enable Email support, add Sun's JavaMail packages and the activation packages to JMeter's classpath .
目前的版本没有支持
不过你的需求却不是一定要email才可以解决,其实“保存响应到文件”就可以了