send emai in sandbox app

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Hi everyone, why is it that when I run my app locally I can send emails with templates without any issues, but when I try to do so in the sandbox app, it won't let me and tells me that an error occurred? Do I need to configure something for this? Please, I need help.  
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1 answers
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Hi Eric,

You have to configure your email first on sandbox environment the same way as on the local environment.

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