MF... were "Codes returned by uucp2mmdf(), mmdf2uucp()".
A spot check of the others shows they've not been used in this git
repository.
-#define LINESIZ 512
-
-#define MBXMODE 0600
-#define TMPMODE 0600
-
-#define OWIDTH 75 /* length of a header line */
-
-#define HFROM 1 /* header has From: component */
-#define HSNDR 2 /* header has Sender: component */
-#define HADDR 3 /* header has address component */
-#define HDATE 4 /* header has Date: component */
-#define HOTHR 5 /* header is unimportant */
-
struct adrx {
char *text;
struct adrx {
char *text;
-/*
- * Codes returned by uucp2mmdf(), mmdf2uucp()
- */
-
-#define MFOK 0 /* all went well */
- /* remaining codes must > DONE */
-#define MFPRM 2 /* bad parameter */
-#define MFSIO 3 /* stdio package went screwy */
-#define MFROM 4 /* from line was bad */
-#define MFHDR 5 /* headers were bad */
-#define MFTXT 6 /* text was bad */
-#define MFERR 7 /* I/O or system error */
-#define MFDLM 8 /* Bad delimiter in MMDF file */
-
-