Yahoo Listing Multiple Domain Names of same site

www.widget-info.com, widget-info.com, widgetinfo.com, www.widgetinfo.com

[Kelcor]

I Think I have read about this here before, but I can't seem to find the answer.

Yahoo seems to be listing many domain re-directs - above our actual domain name.

We use the format "www.widget-info.com" - This is how we brand our company name. We have this exact listing in the yahoo paid inclusion directory, DMOZ, and many links from other sites.

However yahoo only lists, "widget-info.com" or "www.widgetinfo.com" or even widgetinfo.com. 80% of our Yahoo traffic comes in on the redirect names, 20% is through the actual site name.

Links to the other domain names do not exist anywhere (that we know of). It confuses me as to why yahoo lists them in the 1st place.

I can only assume that some random websites that may link to us using the "wrong" domain name - However We have yet to find any by looking at web logs, or backward links. Everything that comes in in tlike this, is always yahoo.

Will this cause issues of duplicate content?

I have found where the many of the same pages from widgetinfo.com, and widget-info.com have been ranked on the same search index page... May sound good for now, but I am worried it may cause unintended problems later.

I have tried to block this using the robots.txt - Howver Yahoo must only update the directory 1 time a year, or they ignore that part of the robots.txt.

Any suggestions on how to remove the other versions? Or do I leave it alone?

[MarkHutch]

The only way I know of to get Yahoo to list your site only under one listing is to use a 301 redirect via .htaccess on your server. I don't know how you are trying to stop this via robots.txt, but it probably won't work. With Yahoo/Slurp it will take a bunch of time for anything to work, but the 301 redirect is your best choice in my opinion.

Search any search engine for "301 redirect" and should should find the code you need. I hope this has been helpful to you.