[tlug] Sendmail's log?

[Nguyen Hung Vu <vuhung@example.com>]

 Hello all,

 How can I check sendmail's logfile to find out who has been accessed
 mail server via POP protocol?
 Which log file contains this info?

 Thank you

+----------------------------------------------------------+
|                  Nguyen Hung.Vu                          |
| The University of Electro-Communications, Tokyo, Japan   |
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| Tokyo Linux Users Group http://www.tlug.gr.jp/           |
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