title: Time limit for send data with Tcl expect
body: <p>I wrote two expect script for sending email using Netcat and Telent.
  With both scripts, the connection to the smtp server drop if the data
  size is too long (over 100k). I guess it is an issue of timeout, because
  if my connection is really fast and my script manage to send all the data
  in less than 2-3 seconds, the script works successfully.</p>
  
  <p>So I wonder if there is a time/size limit for the send command an a way for changing this limit.</p>