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DNS holds SMTP server info?

would a DNS (domain name server) hold information (e.g. IPs, protocols etc) on a SMTP server.

in a nutshell, could i decipher information from the DNS on whether a machine/IP is running SMTP or not. my basic concept of the DNS is - u give it a name and it returns an IP only.
1 Solution
nslookup -query=HINFO <ipaddress> | <machine name>

If it has an MX record it is very likely serving mail

you could also try

telnet machine 25

and see if it answeres
erikleeAuthor Commented:
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