Question: how to check if smtp is enabled on a windows server 2012?
Answer: Fire up the command prompt and type telnet: ... 
At the telnet prompt, type set LocalEcho then press ENTER: ... 
Then type open localhost 25 and then press ENTER. ... 
Type helo me and then press ENTER. ... 
Then type the mail from:email@domain.com – obviously fill in the email address you are actually sending from and then press ENTER.