We're running some exercises on a LISTSERV test box and I'm receiving the
following messages in the LISTSERV logs:

2 Mar 2001 13:45:10 From [ANONYMOUS]@SOMEPIG.NET.NIH.GOV: X-LOGCK
42FB3B4E14724C
26CD AUTHINFO(128.231.201.32) WM: X-POST MQUEUE-L
2 Mar 2001 13:45:37 From [ANONYMOUS]@SOMEPIG.NET.NIH.GOV: X-LOGCK
42FB3B4E14724C
26CD AUTHINFO(128.231.201.32) WM: X-POST MQUEUE-L TO: *LIS (...)
-> MAIL FROM:<[log in to unmask]>
550 5.7.1 Access denied
-> MAIL FROM:<>
550 5.7.1 Access denied
-> RCPT TO:<[log in to unmask]>
550 5.7.1 Access denied
-> RCPT TO:<[log in to unmask]>
550 5.7.1 Access denied
-> No recipient left, message aborted.
-> MAIL FROM:<>
550 5.7.1 Access denied
-> MAIL FROM:<>
550 5.7.1 Access denied
-> MAIL FROM:<>
550 5.7.1 Access denied
-> RCPT TO:<[log in to unmask]>
550 5.7.1 Access denied
-> No recipient left, message aborted.
2 Mar 2001 13:45:37 Message forwarded to:
                    > [log in to unmask] cc: [log in to unmask]

Can someone help me troubleshoot this problem and where to look to correct
it?