Our account was disabled this week and it was like pulling teeth getting back into it. We were finally let back in and our account was enabled (yay!), so we scheduled a campaign because we had a large group of products launching last night.
However, this is what the campaign looks like currently and no one received the email.
Then, the email that our Klaviyo account has as the sender email, keeps getting emails from SendGrid saying “Invalid SMTPAPI Header”. We don’t know what this is and want help getting it resolved.
Best answer by David ToView original