Email card prior to all newsletter content

Use case: For a single post, owner would like to send subscribers a message separate from and prior to all newsletter content, including title and feature image. This is currently not possible; the current email card content can only be visible below the feature image and title, at the top of the written content.

Example of use case:

[Content of email card is between dashed lines, at very top of the email.]

Hi [subscriber],

Starting with this issue, all subscribers can comment on posts and join discussions. Let us know what you think.

Thanks for subscribing,

[Newsletter starts]

Feature image