Comment by consumer451

But there is a per user cost for GSuite... I don't want to be in the middle of any of that. This could scale to 100-200 users.

I guess I could tell them that they have to have a GMail account, and explain on surname.com how to set up Send As?

Then just host the MX at a host which allows me infinite forwards?

But with spam stuff, that would not be ideal.