How to copy a speardsheet from Excel to Thunderbird without lose the line

I always send email contains some Excel spreadsheet to customer or managers. When I copy a spreadsheed from Excel to Thunderbird message, our receiver can not see the line of this spreadsheet in this meassge.
I found a temporary solution on and it works.
Tips : If you copy from Excel and then into Word, then copy from Word into Thunderbird it works fine.

hehe, it’s better for us to search on Google before thinking about the solution right ! Just my thinkin’.

Source : Excel Tables won’t show lines/grid in Thunderbird. Help