I do not know what happened, but junk or spam went on to the blog and you may have received it in your email box.
I believe this happened by a blogger.com service which allows me to send an email to blogger.com and it will auto post. I sent a post this way yesterday and maybe this allowed a person to click reply and post. I am not sure, it could be blogger.com was hacked,
BUT I have removed this option or shut the option off.
I believe this has solved the problem
Andy HoboTraveler.com trying to type on French keyboard in Morocco