Comment 143 for bug 10910

Try to put a file in /etc/thunderbird/pref, which is used by the ubuntu thunderbird with the following content:

//
pref("print.print_landscape", false);
pref("print.print_paper_size_height", "297,00");
pref("print.print_paper_size_width", "210,00");
pref("print.print_paper_size_unit", 1);
pref("print.print_paper_size_type", 1);
pref("print.print_paper_name", "iso_a4");
//
pref("print.postscript.paper_name", "iso_a4");
pref("print.postscript.orientation", "portrait");

That should work as a default for the first use of a printer.