It's the same on my Brother MFC-L2740DW. But I don't print them much, so not sure when it started. It's a pity, my printer can enlarge, but the Windows printing interface doesn't present that option.
Hmm, as suggested by MCHunting at that HP site Ian_574 posted, Outlook works fine. So, just type Outlook.com into Search, & print it from there. That is where Mail is getting its stuff from.