Mozilla Connect

How to change the format of reply header of Thunderbird like reply header of Outlook? 

Could anyone tell me a simple way to remove the vertical lines either side of the original message on a reply email please?

When paste the excel table into the body of emails, the gridlines of excel table are not displayed, the recipients also don't see gridlines.

Thank you for the nice Thunderbird,and I have some suggest or issues1. Design UI and icons, the current UI and icons are ugly.2. When pasting an Excel table, there is no grid line after sending the email.3. The signature supports classification, writ...