Max header lines MTA option

Message size MTA options:  (integer)
The  MTA option causes truncatation a of message&#x27;s original, incoming message header after the specified number of lines (by forcing additional, supposedly header material, into the message body). The default is 10,000. The ,   , and   MTA options provide some protection against denial-of-service attacks in the form of messages with extravagantly large/long headers.

See also the  channel option, limiting how much of the header the MTA will process.

See also:
 * Message size MTA options
 * max_header_blocks MTA Option
 * header_limit MTA Option
 * maxprocchars Option