Thursday, June 12, 2014

SMTP Enumeration: Finding SMTP Servers for a given Domain

nslookup is a command line tool for querying Domain Name System (DNS) servers to obtain specific DNS records, domain name or IP Address mapping.
There are many resource records in a Domain Name System,  MX record specifies Mail Servers accepting email messages.

Open Command Prompt(cmd.exe) and type
> set q=mx

                                          Figure MX records snapshot

Lets see MX records of,,



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  2. Class C checker: assuming you are facilitating your sites on a common facilitating account, the odds are good that every one of your domains are facilitated on a similar class c IP range.