This is one of those sticking points I have with Lightroom: there’s no native FTP export. The functionality is built-in, because it’s possible to export a web gallery via FTP. But not from the regular export. I starting thinking about developing such a plugin as a side project and downloaded the Lightroom SDK to see what I’d be in for. Well it turns out that Adobe already wrote an FTP plugin, they just don’t include it in the default install.