You linked a System.Net.Mail class docs, which is used to send mail via smtp and can't be used to receive mail, which is what Sagar needs.
Otherwise, there are From and Sender. ReplyTo is a different thing.
https://stackoverflow.com/questions/4367358/whats-the-difference-between-sender-from-and-return-pathIt is possible to do with EWS. Not sure about outlook VBO, but likely possible with customization if not available oob. I doubt that you can do that with mapiex.
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Andrey Kudinov
Project Manager
MobileTelesystems PJSC
Europe/Moscow
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