Outlook sending formatting

Outlook encodes data within winmail.dat in a proprietary binary format that Atlassian and JEMH do not work with. In order for Outlook users to interact outside of an Outlook environment the sender need to update their sending fromat from RTF to HTML.

https://support.microsoft.com/en-us/office/change-the-message-format-to-html-rich-text-format-or-plain-text-338a389d-11da-47fe-b693-cf41f792fefa