pop server and smtp

Hi i wish to know which server is running as pop3 and smtp, when i do telnet myip.com 110 these appears:

+OK Hello there.

and smtp

220 srv ESMTP

Anyone can tell how can i know which are they? i have access root of the machine but i don't know which file show that info.

Anyone can teach me?.


Thanks in advance.

 

 

 

 

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