Log connection MTA option

Transaction logging MTA options:  (0-1023)
The  MTA option controls whether or not connection information, e.g., the domain name of the SMTP client sending the message, is saved in the    file (or the   file if    is set to 1). This value is a decimal integer representing a bit-encoded integer, the interpretation of which is given in the table below.

Thus for instance setting  to 3 will result both in additional sorts of log file entries---entries showing when an SMTP connection is opened or closed---and also additional information in regular log file entries showing the name of the system connecting (or being connected to), or the channel hostname of the enqueuing channel when the enqueuing channel is not an SMTP channel. (This is a change from PMDF V5.1 and earlier, where the value was simply 0 or 1, with 1 enabling all the then-available connection logging.) TCP/IP channels have a channel-specific option that can override this setting for particular channels.

See also:
 * Transaction logging MTA options
 * MTA transaction logging
 * MTA transaction log entry format
 * log_format MTA Option
 * Triggering effects from transaction logging with LOG_ACTION
 * PORT_ACCESS mapping table
 * LOG_CONNECTION TCPIP-channel-specific option
 * separate_connection_log MTA Option
 * log_message_id MTA Option
 * log_diagnostics MTA Option
 * maysasl Option