Ability to suppress headers when printing
When printing an e-mail to a printer, it would be nice to be able to suppress some or all[1] headers. The simple case of all[1]/none would be minimally useful. Having a toggle for each normally displayed headers[1] would be even nicer, along with a select all/none button.
[1] Where all is the set of headers that are normally set to be displayed in Edit->_Preferences_->_Mail Preferences_->_Headers_.