-d0

Display system configuration information

-d1

Show sender information

-d2

Trace sendmail’s exit information

-d3

Print the load average

-d4

Trace disk-space calculations

-d5

Trace timed events

-d6

Show failed mail

-d7

Trace the queue filename

-d8

Trace hostname canonicalization

-d9

Trace identd exchanges

-d10

Trace recipient delivery

-d11

Trace delivery generally

-d12

Trace mapping of relative host

-d13

Trace the envelope and envelope splitting

-d14

Show header field commas

-d15

Trace incoming connections

-d16

Trace outgoing connections

-d17

Trace MX record lookups

-d18

Trace SMTP replies

-d19

Show ESMTP MAIL and RCPT parameters

-d20

Show delivery agent selection

-d21

Trace rules and rule sets

-d22

Show address tokenization

-d23

Unused

-d24

Trace assembly of address tokens

-d25

Trace the send-to list

-d26

Trace recipient queueing

-d27

Trace aliasing, ~/.forward file handling, and controlling user

-d28

Trace the User Database

-d29

Trace localaddr rule set rewrite of local recipient

-d30

Trace header processing

-d31

Trace header validation

-d32

Show collected headers

-d33

Watch crackaddr( )

-d34

Trace header generation and skipping

-d35

Trace macro definition and expansion

-d36

Trace the internal symbol table

-d37

Trace setting of options and classes

-d38

Trace database processing

-d39

Display digit database-mapping

-d40

Trace processing of the queue

-d41

Trace queue ordering

-d42

Trace connection caching

-d43

Trace MIME conversions

-d44

Trace safefile( )

-d45

Trace envelope sender

-d46

Show xf file’s descriptors

-d47

Trace effective/real user/group IDs

-d48

Trace calls to the check_ rule sets

-d49

Trace checkcompat( )

-d50

Trace envelope dropping

-d51

Trace unlocking and prevent unlink of xf file

-d52

Trace controlling TTY

-d53

Trace xclose( )

-d54

Show error return and output message

-d55

Trace file locking

-d56

Trace persistent host status

-d57

Monitor vsnprintf( ) overflows

-d58

Trace buffered filesystem I/O

-d59

Trace XLA from contrib

-d60

Trace database-map lookups inside rewrite( )

-d61

Trace gethostbyname( )

-d62

Log file descriptors before and after all deliveries

-d63

Trace queue-processing forks

-d64

Trace MILTER interactions

-d65

Trace nonallowed user actions

-d66

Unused

-d67

Unused

-d68

Unused

-d69

Unused

-d70

Trace queue quarantining (V8.13 and above)

-d71

Unused

-d72

Unused

-d73

Unused

-d74

Unused

-d75

Unused

-d76

Unused

-d77

Unused

-d78

Unused

-d79

Unused

-d80

Trace Content-Length: header (Sun version)

-d81

Trace > option for remote mode (Sun version)

-d82

Unused

-d83

Unused

-d84

Unused

-d85

Unused

-d86

Unused

-d87

Unused

-d88

Unused

-d89

Unused

-d90

Unused

-d91

Log caching and uncaching connections

-d92

Unused

-d93

Unused

-d94

Force RSET failure

-d95

Trace AUTH= authentication

-d96

Allow SSL_CTX_set_info_callback( ) call

-d97

Trace setting of auto mode for I/O

-d98

Trace timers (commented out in the code)

-d99

Prevent backgrounding the daemon

-d0.1

16.6.1^[3ed]

Print version, compilation, and interface information

-d0.4

16.6.2^[3ed]

Our name and aliases

-d0.10

16.6.3^[3ed]

Operating system defines

-d0.12

16.6.4^[3ed]

Print library (libsm) defines

-d0.13

16.6.5^[3ed]

Print _FFR defines

-d0.15

16.6.6^[3ed]

Dump delivery agents

-d0.20

16.6.7^[3ed]

Print network address of each interface

-d2.1

16.6.8^[3ed]

End with finis( )

-d2.9

16.6.9^[3ed]

Show file descriptors with dumpfd( )

-d4.80

16.6.10^[3ed]

Trace enoughspace( )

-d6.1

16.6.11^[3ed]

Show failed mail

-d8.1

16.6.12^[3ed]

DNS name resolution

-d8.2

16.6.13^[3ed]

Call to getcanonname (3)

-d8.3

16.6.14^[3ed]

Trace dropped local hostnames

-d8.5

16.6.15^[3ed]

Hostname being tried in getcanonname(3)

-d8.7

16.6.16^[3ed]

Yes/no response to -d8.5

-d8.8

16.6.17^[3ed]

Resolver debugging

-d11.1

16.6.18^[3ed]

Trace delivery

-d11.2

16.6.19^[3ed]

Show the user-id running during delivery

-d12.1

16.6.20^[3ed]

Show mapping of relative host

-d13.1

16.6.21^[3ed]

Show delivery

-d20.1

16.6.22^[3ed]

Show resolving delivery agent: parseaddr( )

-d21.1

16.6.23^[3ed]

Trace rewriting rules

-d21.2

16.6.24^[3ed]

Trace $& macros

-d22.1

16.6.25^[3ed]

Trace tokenizing an address: prescan( )

-d22.11

16.6.26^[3ed]

Show address before prescan

-d22.12

16.6.27^[3ed]

Show address after prescan

-d25.1

16.6.28^[3ed]

Trace “sendtolist”

-d26.1

16.6.29^[3ed]

Trace recipient queueing

-d27.1

16.6.30^[3ed]

Trace aliasing

-d27.2

16.6.31^[3ed]

Include file, self-reference, error on home

-d27.3

16.6.32^[3ed]

Forwarding path and alias wait

-d27.4

16.6.33^[3ed]

Print not safe

-d27.5

16.6.34^[3ed]

Trace aliasing with printaddr( )

-d27.8

16.6.35^[3ed]

Show setting up an alias map

-d27.9

16.6.36^[3ed]

Show user-id/group-id changes with :include: reads

-d28.1

16.6.37^[3ed]

Trace user database transactions

-d29.1

16.6.38^[3ed]

Special rewrite of local recipient

-d29.4

16.6.39^[3ed]

Trace fuzzy matching

-d31.2

16.6.40^[3ed]

Trace processing of headers

-d34.1

16.6.41^[3ed]

Watch header assembly for output

-d34.11

16.6.42^[3ed]

Trace header generation and skipping

-d35.9

16.6.43^[3ed]

Macro values defined

-d37.1

16.6.44^[3ed]

Trace setting of options

-d37.8

16.6.45^[3ed]

Trace adding of words to a class

-d38.2

16.6.46^[3ed]

Show database-map opens and failures

-d38.3

16.6.47^[3ed]

Show passes

-d38.4

16.6.48^[3ed]

Show result of database-map open

-d38.9

16.6.49^[3ed]

Trace database-map closings and appends

-d38.10

16.6.50^[3ed]

Trace NIS search for @:@

-d38.12

16.6.51^[3ed]

Trace database-map stores

-d38.19

16.6.52^[3ed]

Trace switched map finds

-d38.20

16.6.53^[3ed]

Trace database-map lookups

-d41.1

16.6.54^[3ed]

Trace queue ordering

-d44.4

16.6.55^[3ed]

Trace safefile( )

-d44.5

16.6.56^[3ed]

Trace writable( )

-d48.2

16.6.57^[3ed]

Trace calls to the check_ rule sets

-d49.1

16.6.58^[3ed]

Trace checkcompat( )

-d52.1

16.6.59^[3ed]

Show disconnect from controlling TTY

-d52.100

16.6.60^[3ed]

Prevent disconnect from controlling tty

-d60.1

16.6.61^[3ed]

Trace database-map lookups inside rewrite( )

-d99.100

16.6.62^[3ed]

Prevent backgrounding the daemon