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
C:\Users\prdarsha>nslookup
> set q=mx
> yahoo.com



                                          Figure MX records snapshot

Lets see MX records of gmail.com, microsoft.com, outlook.com.


Enjoy!