E-mails to webmaster@php.net posted to php.mirrors?

I sent an e-mail to webmaster@php.net asking a question about the PHP documentation a few days ago, and today when I searched on Google's groups site for my e-mail address to make sure they had removed the articles I requested, I found my e-mail in php.mirrors! Why are e-mails to webmaster@php.net automatically posted to php.mirrors? If this is going to be done, I think at least a notice should be posted on the PHP site so that people know if they send an e-mail to that address, it's going to become publicly archived, and is not going to be private communication at all. I know you should not depend on e-mail for secure communication, but I think people should at least be told that their e-mail will be posted to a public newsgroup. Adam Porter