WordPress Gremlins

In order to save time, I often employ the facility to respond to posts (including comments left on my own site) using email. This morning, while responding by email, I have noticed that my comments are not being delivered. I’ve received the following automated response from WordPress in all instances:
“We ran into a problem with your recent comment reply by email. Specifically, we weren’t able to find your comment in the email.

We’ll do our best to get this fixed up. In the meantime, you may...