BuddyPress.org

And obviously all those accounts have mail boxes and , receive emails to addresses such as joeblogs@example.com?So is your server hosting BP acknowledged as a server allowed to relay mail from itself under that domain, this sounds more like an issue with your mail server and how it’s been configured – too tightly in respect of spam checking? you may want to check your email logs see what has been arriving at your email server and how it’s dealt with it.