ckbinarsys(1M)                                        ckbinarsys(1M)


       NAME
             ckbinarsys - determine whether remote system can accept binary
             messages

       SYNOPSIS
             ckbinarsys [-S] -s remote_system_name -t msg_type

       DESCRIPTION
             Because rmail can transport binary data, it may be important
             to determine whether a particular remote system (typically the
             next hop) can handle binary data via the chosen transport
             layer agent (uux, SMTP, and so on).

             ckbinarsys consults the file /etc/mail/binarsys for
             information on a specific remote system.  ckbinarsys returns
             its results via an appropriate exit code.  An exit code of
             zero implies that it is OK to send a message with the
             indicated content type to the system specified.  An exit code
             other than zero indicates either that the remote system cannot
             properly handle messages with binary content, or that there is
             no binarsys file.

             Command-line arguments are:

             -s remote_system_name
                              Name of remote system to look up in
                              /etc/mail/binarsys

             -t content_type  Content type of message to be sent.  When
                              invoked by rmail, this will be one of two
                              strings: text or binary, as determined by
                              mail independent of any Content-Type: header
                              lines that may be present within the message
                              header.  All other arguments are treated as
                              equivalent to binary.

             -S               Normally, ckbinarsys will print a message (if
                              the binary mail is rejected) which would be
                              suitable for rmail to return in the negative
                              acknowledgement mail.  When -S is specified,
                              no message will be printed.

             In the absence of the binarsys file, the default is to not
             accept non-text mail messages.




                           Copyright 1994 Novell, Inc.               Page 1

      ckbinarsys(1M)                                        ckbinarsys(1M)


      FILES
            /etc/mail/binarsys
            /usr/lib/mail/surrcmd/ckbinarsys

      REFERENCES
            binarsys(4), mail(1), mailsurr(4), uux(1C)










































                          Copyright 1994 Novell, Inc.               Page 2