# SMTP Enumeration (Simple Mail Transfer Protocol)

```ShellSession
root@kali:~# nc -nv 192.168.1.12 25
(UNKNOWN) [192.168.1.12] 25 (smtp) open
220 WIN-3UR24XX66QZ Microsoft ESMTP MAIL Service, Version: 7.0.6001.18000 ready at Thu, 4 Jan 2018 11:48:35 +0200
```