With regard to "bouncing" e-mail, or other e-mail delivery problems,
there is a list called NODEINFO at CUNYVM aka cunyvm.cuny.edu.
 
That list discusses problems with e-mail delivery.  From the headers:
 
*  Owner= GKMQC@PUCC                    (Geert K. Marien)
 
*  The NODEINFO list has been established so that interested parties may
*  receive and exchange information  regarding problems and/or questions
*  about nodes, particularly mail delivery problems.
*
*  This  list is  not restricted  to BITNet  (CREN) nodes  only, and  is
*  intended to cover all of the various networks.
*
*  Issues  of a  technical  nature  (other than  those  contained in  an
*  explanation of a problem) are  probably best discussed on the various
*  lists that exist for the specific software involved.
 
--  co-owner INFOSYS, TQM-L, CPARK-L, ERAPPA-L, JANITORS, LDBASE-L, et -L
[log in to unmask] "My lists are w/o PEERS ;-)"   s/me    +1 814 863 1843
31 Shields Bldg. -- Penn State Univ -- University Park, PA 16802-1202 USA