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I tried option 1 and ended up getting a "bad httpd config" error. Perhaps I did something funny with the A record. I set the base.domain.name to the IP number listed on my DreamHost Domain Manager. If it matters, the site I'm trying to point to is set up as a sub domain of my main domain at DreamHost.
It does matter. :)
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Just for grins, I also tried changing the CNAME on the Yahoo server so that I could try pointing to the actual sub domain name on DreamHost. I get the same error.
Hmm.
So you shouldn't need any CNAME records. Let's say you want to host a MediaWiki at wiki.mikel.org on DreamHost and your server IP address according to the DreamHost control panel is 123.123.123.123. You should have the following A records at Yahoo for mikel.org:
wiki A 123.123.123.123
www.wiki A 123.123.123.123
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In both cases, I did an nslookup and saw that the mapping looked correct. I'm guessing I'm missing something subtle.
Just to make sure we're on the same page for your current DreamHost configuration: using our previous example, you have wiki.mike.org set up as a fully hosted subdomain on DreamHost, right? And looking at the DNS control panel for that subdomain, the IP address listed there is the one being returned by nslookup, right?
It's easy to miss something in the translation. It's hard for me to describe exactly what to do or what you should see over at Yahoo because I'm not familiar with the Yahoo control panel.
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Option 2 sounds good. I'm concerned about downtime on the email, though. Would changing name servers affect that?
You can set it up so that the DreamHost nameservers are already pointed to your yahoo mail server before you set DreamHost as the nameservers for your domain. That way, both the old and the new nameservers will point to the Yahoo mail servers and mail will always be directed to Yahoo.
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Thanks for the response.
Anytime!