Hello, all.
Windows 10 Professional, MS Office 2003 Professional, Opera browser, Gmail.

I urgently need to send several Word 2003 documents embedded in the body of a Gmail message. Attachment isn't an option.
My problem is that every time I do this, whether as a straight 'cut and paste' or saved as HTML and pasted, scattered sentences or paragraphs appear in a different font and/or size than the rest of their neighbours in each document. I've tried Keep Source Formatting and matching the listed Word/Gmail fonts with no success. It's always the same sentences that are affected. It's going to be too much work to amend the email as each document is more than 1500 words long.
Any ideas welcome!