At 10:01 04/30/2002 Tuesday, Shockley, Anthony wrote:
 >We made a change to our network IP address range. (the first 3 octets
 >changed). I went into the Listserv site configuration and made the change to
 >the places I saw an entry for IP addresses. We are able to send out our
 >newsletter, however we are not either receiving email to join or unsubscribe
 >or Listserv is not processing them.
 >
 >Any suggestions on how to troubleshoot this?

What about the rest of the domain name system's authoritative "A"
Resource Records, and possibly "MX."  Similarly, there may be "caching"
invovled (which expire at Time to Live (TTL) value.

/Pete