LOG TRANSPORTINFO

TCP/IP-channel-specific options: LOG_TRANSPORTINFO (0 or 1)
The SMTP/LMTP client option   controls whether or not  transport information, such as the sending and receiving side IP  numbers and port numbers: TCP&#x7c;MTA-IP&#x7c;MTA-port&#x7c;remote-IP&#x7c;remote-port are included in   file dequeue  entries when the    channel option is enabled for the channel. A value of 1 enables transport information logging. A value of 0 disables it. If not explicitly set, the  TCP/IP-channel-specific option  defaults to 1 (transport  information logging enabled) if at least one of bits 0 or 3 (values 1  or 8) is set for the MTA option    (  as set in the MTA option file in legacy configuration, or at the   level in Unified Configuration),  and otherwise   defaults to 0. The  TCP/IP-channel-specific option may be set  explicitly for a channel to control the logging of transport  information regardless of whether connection logging is generally  enabled.

also affects whether transport information, if available, is included in  bounce messages  generated by the channel.

See also:
 * MTA transaction log entry format
 * logging Option
 * log_connection MTA Option
 * Notification message format
 * TCPIP-channel-specific options