Nothing, the post wil not get wett inside the monitor-postbox. Becouse all the holes en caps al filt with acrylaatkit
You know what's funny, a mate of my in Spain sent me a postcard with almost no adres info on the backside of this postcard.
And it toke the mail some time (almost 4 weeks) to deliver this postcard in the monitor-postbox.
Moonlit: You might not wanna post your address on here. If you do, please add it back in but I'd suggest you'd do better to not give out such information :)