Przykładowy e-mail to np.:
Hi Sue,
Thanks for your message. I'm really sorry to hear that your friend Anna was a victim of cyber-bullying. If I were you I would encourage her to go and report it to the police. I feel really sorry for you and your friend but I think you shouldn't let it go - what's more, I reckon you should tell this story so more people will find out about it and pay more attention in future when something like this happen again.
Some time ago my friend was also a victim of a cyber harassment - somebody tried to blackmail her into uploading to Internet some of her photos. What do you think I should do to help her feel better?
Write soon!
XYZ