That must be heart-breaking and very frustrating. You've done everything you can do to be a good internet citizen and support all the proper technology, but you

That must be heart-breaking and very frustrating. You've done everything you can do to be a good internet citizen and support all the proper technology, but you're still treated badly. If I am correct, gmail now defaults to a "don't trust an IP by default" procedure. If enough people get your emails in a spam folder and mark it as not being spam, the system will start trusting the IP address. It also has to do with volume. This might be a good service offering. If someone could operate a few hundred gmail accounts, they could let people send them messages and mark those messages as not being spam in order to train the filters.