Querying DNS

[Anon]

Hi, I want to know, is there any method to query DNS so I can retrieve its mail exchanger (MX) ?
Say, I received email from [e-mail], and what method should I use to retrieve mail server of hisdomain.com so I can write custom mail delivery program ?
I'd be grateful if someone could help me

[Anon]

I think the best is to use the getenv function. I use often the instruction
$userurl = getenv ("REMOTE_ADDR");
to get the IP number of the people who are visiting my pages.

[Anon]

Not going to do any explaining, but here are some functions to check out.

getmxrr(sting host, array mxhost, array weight)

gethostbyaddr(string ip_address)

gethostbyname(string hostname)

First one is probably what you are looking for, but thought I would include the other two. L8r d00d.