'Integracion de HTML sin templateId

Good evening, I want to send my own html, not created in sendgrid by email, but I can't find a way to integrate it

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that is my code and this is the html template that I want to send

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Solution 1:[1]

You will need to read the contents of your email.html file first, then set those contents as the value of the Content object.

It looks like you are writing this in Java. I'd recommend you check out this article on reading text from a file in Java and pick your favourite method to load the contents into memory and then use them in the Content object.

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Solution 1 philnash