Magento: How to assign a group to user based on domain name email registration

First of all, you create customer group. let say you already create customer group with group_id 7. you can create customer group in backend Admin => Customer => Customer Group. my group_id is 7 & my group name Student.

You can do this by Magento event observer and also register Observer in config.xml

#1 STEP

Register Module in app/etc/modules/Rifki_MembershipGroup.xml

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