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Once you have set a domain alias, you do not need to create redirect rules for all pages.
The domain alias makes all your LPs available on both domains in Marketo. Therefore, your LP go.collegiseducation.com/CP_Unsubscribe.html becomes available with the URL go2.collegisprofessional.com/CP_Unsubscribe.html
There is no automated way to get an LP to display in 1 domain rather that in another.
This idea will give you a good overview on what is possible and what is not: Comprehensive Multi-Domain management . And please vote
A zone apex (like collegisprofessional.com) *cannot* be used as a Domain Alias. You must use a subdomain (pages.collegisprofessional.com, etc.). This is a DNS rule, not a Marketo-specific rule.
When you have a Domain Alias, you don't use redirects, just go straight to the page under the new domain.