JMeter Send and Read email : SMTP Sampler

https://javaee.github.io/javamail/

Download javax.mail.jar file and paste into jmeter/lib folder.
Restart JMeter.

Add a Thread group,  Sampler --> SMTP Sampler

 Enter the From , to , Authentication

 Add a listener
Run the test
Now an email will be sent.

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Read Email :

https://developers.google.com/gmail/imap/imap-smtp

 Thread Group --> Sampler --> Mail Reader Sampler

Execute