[abustamam]

I like this. I don't know what postcard etiquette is, but when I send a postcard it's just to show that I'm thinking of someone while I'm traveling. If the recipient doesn't travel or finds other ways to express that they're thinking or me while traveling (souvenir, etc) I'd consider that social contract fulfilled.

[brewdad]

I haven’t sent a postcard in years but I always thought it was a signal that I am having a great time but also you are important enough to me that I want to include you in the only way I can. I certainly never expected a direct response but hoped I might receive a postcard from that friend at some unexpected future time.