Want to upload a stand alone page thru FTP, but site is in Joomla

I would like to upload an html email I created to my client's server thru my ftp program. I am assuming that it isn't working because his site is in Joo开发者_开发问答mla. I have tried to upload the file, and I see it there in my uploaded files, but when I enter that page address into my browser's address bar it says it can't find the file. Is there a way to do this when his site is in Joomla? Thanks so much! (His site is prohomebuyer.com)

Thanks for commenting. Yes, I have uploaded to public_html, and I see it there. But, when I look for it online, I get the website's error message inside the site template.