larsstorm

Got an old domain? 404 errors all over? using WordPress? 
Time to remove those 404 errors and recover your lost inbound links…
Using SEO404, a very lightweight plugin for WordPress, you can easily change all those 404 errors to 301 redirects for your blog frontpage.
<ul>
<li>Since 0.3 define the 301 redirect destination url.</li>
</ul>
We’ve used this technique to force redirects to the frontpage before. Though usually just included it in a wordpress theme. But why not have this as a plugin? So here is SEO404 WordPress plugin, ready for use.

SEO404

SEO404 redirects to the Blog front page with a 301. No more 404 errors on Google/Bing/etc.

brainfruit

This simple plugin – which is also WordPress network compatible – automatically redirects 404 errors to the best matching and existing content in your WordPress blog. 
The matching is based on the slug of the content not found and searches also on taxonomy pages (tags & categories). This is perfect when you have changed the permalink settings of your taxonomies. 
All redirects are permanent (301) which is a SEO best practice. 
Since this plugin doesn’t need any configuration it works perfect in WordPress Network / multisite setup.

404 ReDirector

Simple, SEO friendly, permanent (301) and automatic redirect of 404 errors.

SEO404 vs 404 ReDirector