Using put Email processor in NiFI java.lang.NullPointerException: java.lang.NullPointerException

@Lorenzo 

There is not enough information provided to provide a good response here.

1. Providing the full stack trace output from the nifi-app.log may provide details that are helpful here (challenging considering the NPE nature of the exception)
2. Are you sure the SMTP server supports username and password authentication and not OAuth2 based authentication instead? PutEmail Additional Details

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Thank you,
Matt

@Lorenzo Has the reply helped resolve your issue? If so, please mark the appropriate reply as the solution, as it will make it easier for others to find the answer in the future.  Thanks.