Hi Sangram,
Its not possible to restrict people from using personal email id's directly but you can do the following -
You can use validations in custom questions
Add validations to the question
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Must contain @
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Must NOT contain:
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@gmail.
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@yahoo.
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@hotmail.
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@outlook.
This works surprisingly well and is widely used.
Second is you can add help text - Personal email IDs (Gmail, Yahoo, Outlook, etc.) are not accepted. Submissions using personal email addresses will be rejected.
You can even set rules in review process.
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Abhishek Kapoor
EcoVadisFrance
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