4.3BSD/usr/src/usr.lib/sendmail/adm/TraceFlags

0	config
1	from person
2	finis
3	samefrom
4	checkerrors
5	clock
6	savemail
7	queuename
8
9
10	deliver
11	openmailer
12	remotename
13	sendall
14
15	getconnection
16	makeconnection
17	srvrsmtp
18	usersmtp
19
20	parse
21	rewrite
22	prescan
23	cataddr
24
25	sendto
26	recipient
27	alias
28
29
30	collect
31	headers
32	eatheader
33	crackfrom
34
35	macro
36	stab
37	setoption
38
39
40	queue
41
42
43
44
45
46
47
48
49