[hnbreak]

IDK. While this idea is as old as the Internet, does it make any sense? The key point of a postcard is not to communicate (limited space, not secure, slow) but being a gesture. Buying a postcard, writing something on it and bringing it yourself to the post office is a huge gesture and signals many things--in contrast to postcard gateways like this one. Any receiver who will get this machine printed postcard will think, 'why didn't she/he just text me?' and throws it in the trash bin.

But maybe OP can give us a hint about the real use case or he is hand-writing the cards himself.

[xnzakg]

OP's reason for making this is mentioned in the "about" section of the page - sending physical photos to people who prefer those over something like Instagram.

[hnbreak]

Still doesn't make sense. Instagram and postcards have different use cases and latter is not about sending someone a physical photo or showing a any photo (hint again: it's a gesture).

[daliusd]

There are cases where sending real postcard is not feasible. E.g. traveling in mountains. Sometimes you are a little bit lazy but still want to make it at least a little bit personal.