what does this mean?

Wed Jan 5 06:14:29 PST 2005

Jan  5 12:30:51 server sendmail[15412]: j054UpEd015412: collect: 
premature EOM: unexpected close
Jan  5 12:30:51 server sendmail[15412]: j054UpEd015412: collect: 
unexpected close on connection from localhost, 
sender=<inamotokin at yahoo.com.hk>

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