On 31 Mar 2019 at 12:53p, mark lewis pondered and said...
 
 ml> well, there's the problem... there must be a net on the first address of
 ml> each line... if they are all in net1, it should look like this:

Hi Mark.

This is not an area of expertise for me but I went looking for info on the
fstc.org site and found this

[snip]

Seen-by Lines

               There can  be many  seen-by lines  at the  end of Conference
               Mail messages,  and they  are the real "meat" of the control
               information. They  are used  to  determine  the  systems  to
               receive the exported messages. The format of the line is:

                           SEEN-BY: 132/101 113 136/601 1014/1

               The net/node  numbers correspond  to the net/node numbers of
               the systems having already received the message. In this way
               a message  is never  sent to a system twice. In a conference
               with many  participants the  number of  seen-by lines can be
               very large.   This line is added if it is not already a part
               of the  message, or added to if it already exists, each time
               a message  is exported  to other systems. This is a REQUIRED
               field, and  Conference Mail  will not  function correctly if
               this field  is not put in place by other Echomail compatible
               programs.

[snip]

There does not seem to be any reference to requiring that NET be displayed at
the start of each SEEN-BY line - perhaps I should be looking at another
reference doc?

Best, Paul

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