To our knowledge, only the use of Courier 10 or Times New Roman 10 ensure well-formatted uploads.
These fonts limit line length to 80 characters, which is needed to fit into the cunix vt-100 screen-width limitation.
If you do find yourself needing to use other type fonts, such documents may be able to be uploaded with their overall format retained IF the number of characters per line is always less than 80. (SAVE AS / TYPE / MS-DOS TEXT WITH LINE BREAKS)