"expect to be able to use email" This just summarizes the problem. People "expect" to use a free email system and still be treated equally to those who pay good money for a legitimate SMTP host that cares about the quality of service they provide to their customers.

Legitimate email providers take measures to ensure their customers aren't spammers and those who don't end up on the spammer lists and this is exactly the way it should be.

Until Google takes a stand against the spammers who use their systems, they should be on the list just like all the others.