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How to trace the IP address of the computer used in sending an email

Posted on 1998-11-12
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Last Modified: 2013-12-23
Dear experts:

Pls. help, We have recieve an email from a certain "equalizer_the@usa.net" and i contains a lot of anomalous things. We have our own Mail Server which is a Digital Alpha Unix Server. My question is how can I detect as an administrator the IP address of the sender. Pls. help coz its very urgent!

thanks

mokong
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ahoffmann earned 50 total points
ID: 1582594
If you look at the mail header, the "real" sending mashine is listed in the last (from top) "Received" line.
If the mail was made diectly using port 25 on your mail exchanger, check your syslog (or messages or whatever it is on Digital Alpha): serach for connection to sendmail with the appropriate date.

Finaly if you identified the sending mashine, use nslookup to find it's IP.
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