OK, we'll need some more information to start thinking about this.
- I take it that it's your friend who can't see the body of the emails you send her, and who gets the warnings, right? Exactly what error messages or warnings are we talking about?
- Next, which email program do you use, and which one does your friend use? Likewise, does she use a Mac or a Windows machine?
- Finally, you might want to check if emailing other people causes the problem to occur there too.
