Michael Ott

It’s often too easy to make edits to your web site that result in a broken link. This plugin will automatically email the web site administrator (or a specified email address) whenever a 404 is encountered, along with a link to the page the 404 originated from. With this knowledge in hand, you can search the page for the problem and either remove or fix it.
Notifications are also triggered by missing media, such as images, video, CSS files and more.
<h3>Support</h3>
Report any issues at the official <a href="https://wordpress.org/support/plugin/404-notify/" rel="ugc">404 Notify Support</a> WordPress page.
<h3>How to use</h3>
Once activated, notifications are automatially sent to the site administrator, or, you can specify an alternative email address in Settings -> General and look for the 404 Notify email address field.
<h3>Uninstall</h3>
Deactivate the plugin, delete if desired.

404 Notify

It works as presented. When an internal link leads to 404 you get an email alert. 

Job well done

Get a notification whenever a 404 is encountered on your web site.

digitalsolutionsmedia

Picture this: you have your affiliate website up and running, traffic is on track and increasing, and your content is hitting the target… but then you check your affiliate account balance and nothing seems to change…
We’ve all been there. Broken links can cost you thousands of dollars in revenue! **
Thankfully, Simple Affiliate Link Checker will alert you every time you have a dead affiliate link, so you don’t need to check it yourself while you’re losing time and money!
The plugin will check your links on a regular basis and alert you if there’s any problem with them.

Simple Affiliate Link Checker

A plugin that will alert you every time your affiliate links are dead, avoiding the loss of commissions caused by a bad link.

404 Notify vs Simple Affiliate Link Checker