Anonymous asks:
We have an application that sends out mail, but it isn't working right. It's sending local domain mail to the wrong server. I figure it must be getting the MX from local DNS, but how can I check that with nslookup?
I'd install Linux and use "dig" or "host", but I suppose that's asking a bit too much.
I couldn't remember how to use nslookup for that, so I invoked Google, which sent me to Using NSlookup.exe, which enlightened me with this less than ideal wisdom:
To look up different data types within the domain name space, use the set type or set q[uerytype] command at the command prompt. For example, to query for the mail exchanger data, type the following:
C:\> nslookup Default Server: ns1.domain.com Address: 10.0.0.1 > set q=mx > mailhost Server: ns1.domain.com Address: 10.0.0.1 mailhost.domain.com MX preference = 0, mail exchanger = mailhost.domain.com mailhost.domain.com internet address = 10.0.0.5
But that's not right. It's not wrong, but it assumes the user is trying to find out if a machine IS an MX, which is not what you want to know. For your question, you'd do:
> set q=mx > domain-you-want-to-know-about
For example, if you wanted to know the MX for my domain, you'd type "aplawrence.com".
Leave it to Microsoft to give the least likely usage as their example!
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More Articles by Anthony Lawrence © 2015-04-28 Anthony Lawrence
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How do I look up an MX record with nslookup? Copyright © April 2015 Tony Lawrence
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