I am trying this trailhead, AppExchange Partner Basics, and I can't register for Partner program:
The error I get when submitting registration form is: "This email domain is restricted from signing up for our Partner Program."
I read on this link above that this form won't accept @gmail, @yahoo, @outlook and similar email inboxes. How can I then register and complete the training for ISV?
The answer there suggests "reaching out to Salesforce". How do I "reach out to Salesforce" with my trailhead Salesforce account?