I have the following code in my ~/.exmh/exmh-defaults file:
*Mops.reply.m.uentrylist: replFormatCcAll
*Mops.reply.m.l_replFormatCcAll: Reply to all with
format options
*Mops.reply.m.c_replFormatCcAll: Msg_Reply -format -cc all
*Mops.reply.m.uentrylist: replFormat
*Mops.reply.m.l_replFormat: Reply with format options
*Mops.reply.m.c_replFormat: Msg_Reply -format
Only the last button (the "Reply with format options"
button) is added when exmh starts. The other button is
ignored. If I reverse the order of the two buttons in
my exmh-defaults file, then the "Reply to all with
format options" button is on the menu while the other
is not.