HTML body property is null or empty when initiating a workflow by email

Problem

We have an xMatters workflow with an email trigger which is designed to parse the message to send an alert based on script conditions. Occasionally, the workflow fails with an empty message body even when the trigger email is complete. When we review the xMatters workflow, the input itself shows the body as empty.

Environment

All versions of xMatters

Resolution 

This error can occur when certain headers are included in the email. To fix this, you can remove the optional Content-Disposition header, so the receiving server renders the disposition per its configuration.

You can also check the Content-Transfer-Encoding header. If you send this, it must be set to one of these options, and avoid values like 'CHUNKED'.

Cause

Some email headers conflict with our downstream email initiating provider. 

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