Dear @Heather Anderson,
Thank you for posting your question in the Microsoft Q&A forum.
As a moderator, I don't have the tools to investigate your specific account directly. Because this is a user-to-user support forum so I have the same experience as you and other users in this forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. However, I will try my best to guide you as clearly as possible.
- Could you please help me attach some images to show how the two look different? I'd like to see a screenshot of when you are composing the email versus a screenshot of the email received in Gmail, so I can see how the formatting changes.
- As you mentioned, the formatting issue is only related to the mail content; it shouldn't be related to the Excel sheet since that part is just for the recipients.
- In the Mail Format settings, should I choose HTML, Attachment, or Plain Text?
- Also, can you help me go to the View tab in Word > select Web Layout > and check if the format changes compared to the Print Layout?
With your help, I will try to pinpoint the exact issue you are facing.
I look forward to your support and response!