Unable to accept emails from SendGrid

An, Po | Po | ECFD 5 Reputation points

I want to recieve alert email from program via SendGrid. Everytime my program and SendGrid shows that email was sent, but I couldn't recieve it at Teams channel.

My Teams channel is set as following, but it still reject the email from sendgrid.
Is there any other seeting I need to do to let email from sendgrid in?
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Microsoft Teams
A Microsoft customizable chat-based workspace.
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