For a while, I’ve been a bit annoyed with WordPress losing pings (those automatic links on your blog when someone links to you) that should be coming to my posts. I noticed that when I or an external blog link to more than one of my posts only one ping would register in my comments. For example, if someone writes that:
Scott has written WordPress plugins to make it easier to write about code, generate monster avatars and generate unique geometric shapes for each commentor.
I would want a ping to appear on each of those linked posts, both to thank the linking blog for writing about me and to provide useful information to the reader (and to increase my comment counts). Yet WordPress only puts a ping on the first linked page.
It took me a little while to figure out why WordPress kept losing my pings since I wasn’t even sure if it was a problem on the sending or receiving end but it turns out WordPress is filtering pings because it thinks the comments are coming too fast. I’ll put the details below but if you just want to make sure all the pings intended for your blog actually reach it then here is the plugin for you.