MAX B ENTRIES

TCP/IP-channel-specific options: MAX_B_ENTRIES (integer)
New in MS 6.2. This TCP/IP-channel-specific SMTP server option specifies the maximum number of " " entries per SMTP connection session  that the server will write to the  MTA message transaction log   file. Bad commands sent to the SMTP server are logged as " " records in the MTA&#x27;s message log file , if message logging has been enabled (the    channel option). In such " " entries, the recipient address field will contain the bad command that was  rejected by the SMTP server as invalid, while the diagnostic field will  contain the response the SMTP server gave. Once the value of   has been reached, the SMTP server writes its final (for  that session) " " record, with the string (limit reached; last B record for this session) appended to the diagnostic field. The default value for   is 10. Note that keeping this value set to a reasonable size keeps the MTA from wasting too much time writing " " entries for  unrecognized/illegal command attempts, so that deliberate fake command  attempts will not distract the MTA from more important work;  i.e., it protects against a certain form of "denial of  service" attack. See also the (new in MS 6.2)  channel option.

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