Our software organizes and archives email on behalf of our clients. We have recently noticed that emails from Square were being archived in the wrong place. We use the References header to thread messages.
The References header should contain a chain of Message-IDs from parents of the email. Each Message-ID should be globally unique.
It appears that emails from Square now contain the value of “messenger@messaging.squareup.com”, which neither unique nor a parent’s Message-ID.
Is there any way to get this fixed so emails follow the RFC 822 standard?
rfc822#section-4.6.3
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