I set up a Wix Code form and followed Nayeli's tutorial and double-checked the Wix tutorial but neither work when it's time for my client to receive the email from SendGrid with the form submission.
I'm attaching all the codes as images.
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I'm not sure; I found out info. from someone else. You could contact SendGrid technical support.
Check your SendGrid e-mail account and see if SpamCop blocked it (which I believe it does if you don't a paid account).