I have a list of about 100,000 email servers (host name and IP address) and I would like you to run an nmap OS fingerprint process on them. Collect the data, format it, and provide it back. I want to make sure that we are checking all the correct default ports with the goal of understanding what specific email server software is running. Sendmail, MS Exchange, etc. I would like the final file to be in a pipe delimited text file. Should we work together on this, I would like a file of the first 100 records approved just so that file layout, format, and expectations are properly agreed to.
This project can be as simple as a one liner in NMAP and then some post processing of the data. But to do this right, a bit of research will be required to get the correct one liner. Just so I know you have a clue about what I am talking about, suggest the NMAP one liner you have in mind and let's use that as a discussion starter.
Please read the project first and write the word "Understood". Also write your steps and suggestions to complete the project with a short description of what you understood.