There's a problem when you try to link two (or more) lists in a peer-to-
peer fashion.
 
A. You normally want replies to back to the list.
B. If someone wants replies to go directly to him, instead, you want to allow
   him to specify a Reply-To: line to force that.
 
When you're running just a single list, with no linked copies, this is easy:
just specify REPLYTO= LIST,RESPECT.
 
If you're running two list servers linked together peer-to-peer, this
causes some unintended results.
 
1. Assume the sender is on LISTSERV A, and sends mail without a REPLY-TO to
   his LISTSERV.
2. Subscribers on LISTSERV A get mail with SENDER: being the list on
   LISTSERV A, and a REPLY-TO: for the same list.
3. Subscribers on LISTSERV B get mail with SENDER: being the list on
   LISTSERV B, and a REPLY-TO: for the list on LISTSERV A!
 
This isn't what you want, so you consider using LIST,IGNORE.
Now every subscriber gets mail with SENDER: and REPLY-TO: pointing to the
list on their respective LISTSERV.  This satisfies requirement A above.
But remember requirement B:  Now if a subscriber on wants to
send mail, including his own REPLY-TO:, it gets thrown away!
 
The problem appears to be that LISTSERV doesn't realize in all the places
that it needs to that a subscriber to a list is actually another linked list.
Somehow it needs to be aware of that and ignore REPLY-TOs that specify a
linked list, but respect ones which specify anyone else.
 
Richard