Yeah, I got a special exemption from them for the name. :)

But how? Did you talk with some of the guys behind Dropbox or what did you exactly do to be allowed to violate this rule?

I wrote my app before Dropbox had published any branding guidelines for developers (3+ years ago), so I was essentially grandfathered in. Perhaps my phrasing of "special exemption" was a bit strong. I apologize for that. I dug up this email exchange: http://i.ralph.io/95cc7ww3.png

Something also not offered in the usual "just build a great product" advice, there is so much to be said for getting in on something EARLY.

Google "send to dropbox", this site is #1. Guaranteed income to some extent just because of that. People need to build a great product, but that's not enough. You have to get it in front of alot of people. Try to do this same thing today, dropbox will slap you down.

Get in early on some area with a bright future, before the crowd - AND build a great product, I would think better than just build a great product.

You asked "will you have a problem with my name "Send to Dropbox"?" and they said yes. It does look, based on the rest of their response, that they were instead answering the unasked question "is it ok to use the name?" but their response definitely makes things more ambiguous.