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Old 18th November 2012, 16:15
till till is online now
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This does not nescessarily mean that the server is compromised, most likely someone got just a password of a email account on your server e.g. when the user authenticated without encryption over a open wlan and someone sniffed the password. Is this a email account on your server?

pkjoshi@cbsindia.in

If yes, then you should change the password of this account to stop the mail sending.
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