Library /sys$common/syshlp/mailhelp.hlb Getting Started, REPLY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    1.MAIL> REPLY
      To:  FLAXEN::PIERCE
      Subject:  Re: Using the REPLY command
      Enter your message below.  Press Ctrl/Z when complete, Ctrl/C to quit:

      This example shows how to use the REPLY command.

      When you receive a message and want to respond to it, enter
      the REPLY command at the MAIL> prompt and press Return. Mail
      displays the header information automatically, as shown in this
      example.

      When you finish typing your response, press Ctrl/Z. You are
      signaled that you have just received a new message. To read the
      message, enter the READ/NEW command.