Couple of much faster ways to obtain that information on your own...
One - use the DH control panel, go to Manage Domain and click on the DNS link for the domain in question. You don't need to host your DNS here in order to access, and in your case, make use of that info.
Two - this is even faster, query the DH nameservers directly for this info using dig or nslookup. If you're using a Windows OS computer at the moment, have a look at http://technet.microsoft.com/en-us/library/aa998082(EXCHG.65).aspx for sample instructions. You can use ns1.dreamhost.com for a DH nameserver to query.
Good luck. And BTW, since I noticed your other message on this topic and it looks like you'll be moving the email of a biz client soon - I'll tell you that a couple of my clients have been quite happy with Google Apps so far.
Again, good luck.
-- jt
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