Uploading a PNG as proof of what I mean — does not work. I also got other problems on your BB site:
Sorry! The page could not be loaded.
235 Unable to send e-mail.
Please contact the forum administrator with the following error message reported by the SMTP server: “535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6 “
Oh, now I was finally able to add my image file!