If you sent me this e-mail, please write again!

A couple of weeks ago, I received an e-mail which read something like this:

Someone told me to link to your blog. Do I know you?

I intended to reply, but the terse correspondent neglected to leave a name, reply address, URL, or any other form of cyberidentification. So if it was you, please write again with a return address!

My answer, in any case, would be:

Please feel free to link to my blog. Whether or not you know me, of course, depends on who you are. I can't help you with that question.