I'm setting up a Membership Pro with offline payment and I have set this for Registration integration.
When I change the user account from "Pending" to "Active" the activation email isn't sent even though it's set to "Yes" The email that goes out advises that users can log in but the Joomla user settings are not updated so users can't log in.
Could you please check and make sure send activation email parameter in Membership Pro config option set to Yes?
Also, maybe you should try to test using a different email. Sometime, mail server could not deliver email to some email addresses and you should try to use a different one
