Error notification email

good afternoon friends
I want to ask
I want to make an email notification but an error appears like this self signed certificate in certificate chain.
Please help

Welcome to the forum @imamdwi.

You have not provided enough information for us to understand the problem.
Please show us the full error message.
Where does the error appear?
Which node is generating the error?
If it is the email node then show us how you have configured it.
You can paste a screenshot here if necessary.

Capture

You don't appear to have answered this part of the question

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