AUTO-ADMIN: Non-MP3, WAV, OGG, SoundCloud, YouTube, Vimeo, Twitter and Facebook links in this post have been protected automatically. Once the member reaches 5 posts the links will function as normal.The url created by the download page is incorrect for PHP based web servers when an email address contains a plus. For example, email@example.com. PHP magically converts it to a space unless special measures are taken.
The workaround is to replace the plus character with %2b as in firstname.lastname@example.org.
You may wonder if a plus character is a legitimate character in an email. It is, please consult the email RFC 5322 section 3.2.3: