It's not about receiving mail, it's about sending to others using Gmail accounts.

I have moved away from Google, that is the point of this mailserver. My point is that Google isnt interested in doing anything I send to @gmail.com addresses except classifying it as spam.

Now it would be nice if the people I want to email would move away from Google, but I highly doubt that is going to happen anytime soon.

Read it again: it's his clients that are using google