# https://raw.github.com/augieschwer/grok-patterns/master/sendmail.grok
#

EMAIL %{LOGIN}@%{IPORHOST}
DSN [0-9][.][0-9][.][0-9]

# Match a relay that gives us a QID in the return status.
SENDMAIL_TO_1 %{SYSLOGBASE} %{QID:qid}: to=<%{EMAIL:to}>, (%{WORD}=%{DATA},)+ relay=%{IPORHOST:relay} \[%{IP}\], dsn=%{DSN:dsn}, stat=%{DATA:status} \(%{QID:qid} %{GREEDYDATA:status_message}\)

# Match a relay that does NOT give us a QID in the return status.
SENDMAIL_TO_2 %{SYSLOGBASE} %{QID:qid}: to=<%{EMAIL:to}>, (%{WORD}=%{DATA},)+ relay=%{IPORHOST:relay} \[%{IP}\], dsn=%{DSN:dsn}, stat=%{DATA:status} \(%{GREEDYDATA:status_message}\)

# Match a message with no relay IP address or status message.
SENDMAIL_TO_3 %{SYSLOGBASE} %{QID:qid}: to=<%{EMAIL:to}>, (%{WORD}=%{DATA},)+ relay=%{IPORHOST:relay}, dsn=%{DSN:dsn}, stat=%{GREEDYDATA:status}

# Match a message with no relay info at all.
SENDMAIL_TO_4 %{SYSLOGBASE} %{QID:qid}: to=<%{EMAIL:to}>, (%{WORD}=%{DATA},)+ stat=%{GREEDYDATA:status}

### TODO - match multiple recipients in To: field.
#SENDMAIL_TO_5 %{SYSLOGBASE} %{QID:qid}: to=(<%{EMAIL:to}>,)+ (%{WORD}=%{DATA},)+ %{GREEDYDATA:status}

SENDMAIL_TO (%{SENDMAIL_TO_1}|%{SENDMAIL_TO_2}|%{SENDMAIL_TO_3}|%{SENDMAIL_TO_4})

SENDMAIL_FROM %{SYSLOGBASE} %{QID:qid}: from=<%{EMAIL:from}>, (%{WORD}=%{DATA},)+ relay=%{IPORHOST:relay} \[%{IP}\]

SENDMAIL_OTHER_1 %{SYSLOGBASE} %{QID:qid}: %{GREEDYDATA:message}
SENDMAIL_OTHER_2 %{SYSLOGBASE} STARTTLS=(client|server), relay=(\[)?%{IPORHOST:relay}(\])?%{GREEDYDATA:message}
SENDMAIL_OTHER_3 %{SYSLOGBASE} STARTTLS: %{GREEDYDATA:message}
SENDMAIL_OTHER_4 %{SYSLOGBASE} ruleset=tls_server, arg1=SOFTWARE, relay=%{IPORHOST:relay}, %{GREEDYDATA:message}
SENDMAIL_OTHER_5 %{SYSLOGBASE} STARTTLS=client, error: %{GREEDYDATA:message}

SENDMAIL_RELAY %{SYSLOGBASE} ruleset=check_relay, arg1=(\[)?%{IPORHOST}(\])?, arg2=%{IP:ip}, relay=(\[)?%{IPORHOST:relay}(\])??%{GREEDYDATA:message}

SENDMAIL_AUTH_1 %{SYSLOGBASE} AUTH=server, relay=%{IPORHOST:relay} \[%{IP}\]( \(may be forged\))?, authid=%{LOGIN:user}(@%{IPORHOST})?, %{GREEDYDATA:message}
SENDMAIL_AUTH_2 %{SYSLOGBASE} AUTH=server, relay=\[%{IP}\], authid=%{LOGIN:user}(@%{IPORHOST})?, %{GREEDYDATA:message}
SENDMAIL_AUTH (%{SENDMAIL_AUTH_1}|%{SENDMAIL_AUTH_2})

SENDMAIL_OTHER (%{SENDMAIL_OTHER_1}|%{SENDMAIL_OTHER_2}|%{SENDMAIL_OTHER_3}|%{SENDMAIL_OTHER_4}|%{SENDMAIL_OTHER_5})

SENDMAIL (%{SENDMAIL_TO}|%{SENDMAIL_FROM}|%{SENDMAIL_OTHER}|%{SENDMAIL_AUTH}|%{SENDMAIL_RELAY})