HIDE IN THE LIGHT

Strange as it seems, it sometimes pays not to hide under the staircase, but to run outside into the sunlight. Escaping an earthquake teaches us, it does. But keeping secrets on internet? Possibly. Just as you know where to send them... and put stickres on your eyes...

Here's the adress:
POSTSECRET
[American, but available in French and German]

For the Dutch there's:
BRIEFGEHEIM [Nederlands]