sendmail, 4th Edition

$_

$_

RFC1413-validation & IP source route

$a

$a

The origin date in RFC822 format

${addr_type}

${addr_type}

Is address recipient/sender header/envelope

${alg_bits}

${alg_bits}

The number of bits in the TLS cipher

${auth_authen}

${auth_authen}

RFC2554 AUTH credentials

${auth_author}

${auth_author}

RFC2554 AUTH= parameter

${auth_ssf}

${auth_ssf}

AUTH encryption keylength

${auth_type}

${auth_type}

Authentication mechanism used

$b

$b

The current date in RFC2822 format

${bodytype}

${bodytype}

The ESMTP (Extended SMTP) BODY parameter

$B

$B

The BITNET relay ( mc configuration, deprecated)

$c

$c

The hop count

${cert_issuer}

${cert_issuer}

Distinguished name of certificate signer

${cert_md5}

${cert_md5}

MD5 of cert certificate

${cert_subject}

${cert_subject}

The cert subject

${cipher}

${cipher}

Cipher suite used for connection

${cipher_bits}

${cipher_bits}

TLS encryption key length

${client_addr}

${client_addr}

The connecting host's IP address

${client_flags}

${client_flags}

The nature of the connection

${client_name}

${client_name}

The connecting host's canonical name

${client_port}

${client_port}

The connecting host's port number

${client_resolve}

${client_resolve}

Result of lookup of ${client_name}

${cn_issuer}

${cn_issuer}

Common name of certificate signer

${cn_subject}

${cn_subject}

Common name of certificate

${currHeader}

${currHeader}

Current header's value

$C

$C

The DECnet relay ( mc configuration)

$d

$d

The current date in Unix ctime (3) format

${daemon_addr}

${daemon_addr}

Listening daemon's address

${daemon_family}

${daemon_family}

Listening daemon's family

${daemon_flags}

${daemon_flags}

Listening daemon's flags

${daemon_info}

${daemon_info}

Listening daemon's syslog information

${daemon_name}

${daemon_name}

Listening daemon's name

${daemon_port}

${daemon_port}

Listening daemon's port

${deliveryMode}

${deliveryMode}

The current delivery mode

${dsn_envid}

${dsn_envid}

The DSN ENVID= value

${dsn_notify}

${dsn_notify}

The DSN NOTIFY= value

${dsn_ret}

${dsn_ret}

The DSN RET= value

$e

SmtpGreetingMessage

The SMTP greeting message

${envid}

${envid}

The original DSN envelope ID

$E

$E

The X.400 relay (unused) ( mc configuration)

$f

$f

The sender's address

$F

$F

The fax relay (mc configuration)

$g

$g

The sender's address relative to recipient

$h

$h

Host part of the delivery agent triple

${hdr_name}

${hdr_name}

The current header's name

${hdrlen}

${hdrlen}

The length of ${currHeader}

$H

$H

The mail hub ( mc configuration)

$i

$i

The queue identifier

${if_addr}

${if_addr}

The IP address of the receive interface

${if_addr_out}

${if_addr_out}

The IP address of the send interface

${if_family}

${if_family}

The network family of the receive interface

${if_family_out}

${if_family_out}

The network family of the send interface

${if_name}

${if_name}

The name of the receive interface

${if_name_out}

${if_name_out}

The name of the send interface

$j

$j

Official canonical name

$k

$k

UUCP node name

$l

UnixFromLine

The Unix From format

${load_avg}

${load_avg}

The current load average

$L

$L

The unknown local user relay (mc configuration)

$m

$m

The DNS domain name

${mail_addr}

${mail_addr}

Saved $: value for MAIL FROM: triple

${mail_host}

${mail_host}

Saved $@ value for MAIL FROM: triple

${mail_mailer}

${mail_mailer}

Saved $# value for MAIL FROM: triple

${msg_size}

${msg_size}

Size of the current message

$M

$M

Whom we are masquerading as ( mc configuration)

${MTAHost}

${MTAHost}

Host for the msp feature

$n

$n

Error message sender

${nrcpts}

${nrcpts}

Number of envelope recipients

${ntries}

${ntries}

Number of delivery attempts

$o

OperatorChars

Token separation operators

${opMode}

${opMode}

The startup operating mode

$p

$p

The sendmail process ID

$q

$q

The default format of the sender's address (obsolete)

${queue_interval}

${queue_interval}

The interval specified by -q

$r

$r

The protocol used

${rcpt_addr}

${rcpt_addr}

Saved $: value for RCPT TO: triple

${rcpt_host}

${rcpt_host}

Saved $@ value for RCPT TO: triple

${rcpt_mailer}

${rcpt_mailer}

Saved $# value for RCPT TO: triple

$R

$R

The relay for unqualified names ( mc configuration, deprecated)

$s

$s

The sender host's name

${sendmailMTACluster}

${sendmailMTACluster}

The LDAP cluster to use

${server_addr}

${server_addr}

The address of the connected-to machine

${server_name}

${server_name}

The hostname of the connected-to machine

$S

$S

The smart host ( mc configuration)

$t

$t

The current time in seconds

${tls_version}

${tls_version}

TLS/Secure Sockets Layer (SSL) version

$u

$u

Address part of a delivery agent triple

$U

$U

The UUCP name to override $k ( mc configuration)

$v

$v

Version of the sendmail

${verify}

${verify}

Result of cert verification

$V

$V

The UUCP relay for class $=V ( mc configuration)

$w

$w

The short name of this host

$W

$W

The UUCP relay for class $=W ( mc configuration)

$x

$x

The full name of the sender

$X

$X

The UUCP relay for class $=X ( mc configuration)

$y

$y

Name of the controlling TTY

$Y

$Y

The UUCP relay for unclassified hosts ( mc configuration)

$z

$z

The recipient's home directory

$Z

$Z

Version of the mc configuration ( mc configuration)