Thursday, June 24, 2010

Bulletproof Data Center

To all network, firewall & server administrators,

You might want to block the entire class C from to MSG is famous for supporting scam and spam related abusers and we constantly getting unauthorized SMTP requests from these IPs.

Sample SMTP request
[][2955580] rsp: 220
[][2955580] connected at 6/14/2010 7:01:35 PM
[][2955580] cmd: HELO
[][2955580] rsp: 250 Hello [][][2955580] cmd: MAIL FROM:
[][2955580] rsp: 250 OK Sender ok
[][2955580] cmd: RCPT TO:
[][2955580] rsp: 550 No such user here[][2955580] disconnected at 6/14/2010 7:01:41 PM


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