I added In-Reply-To and References in my headers while sending Email through SendGrid, however it doesn't work
I added In-Reply-To and References in my headers while sending Email through SendGrid, however it doesn't work Question: So I am sending an email reply through SendGrid and I have a message object something like this: message = { "personalizations": context["personalizations"], "from": {"email": context["sender_email"]}, "subject": context["subject"], "content": [{"type": MimeType.html, "value": context["body"]}], "reply_to": {"email": context["reply_to"]}, "headers": …