Additional headers

  • I am trying to minimize any spaminess in my emails by sending multi-part mime messages. Currently, I am using Formidable Forms to send an HTML mail, but there does not appear to be a way to include a plaintext version, and this is decreasing my emails spam assassin score by about 10%.

    I noticed the “Additional Headers” field in Postman which I am using to send site email via Sparkpost (smtp). I was wondering if I could use X-MC-Autotext to include a plaintext version of my site mail.

    However, I could not find much documentation on using additional headers with Postman. For example, this mandrill article talks notes that X-MC-Autotext indicates that a flag is used: “true, on, yes, or y to turn on automatic text generation”. https://mandrill.zendesk.com/hc/en-us/articles/205582117-How-to-Use-SMTP-Headers-to-Customize-Your-Messages#custom-header-reference

    What is the syntax then to enable (for testing at least) the X-MC-Autotext header for all outgoing mail? “X-MC-Autotext”: true, perhaps?

    Does Postman accept a comma-separate list of headers in this or a similar format?

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