Servicedesk plus incorrect e-mail Address

Servicedesk plus incorrect e-mail Address

in a ticket, requester has mentioned incorrect e-mail address in "e-mail IDs to notify field"

As a result ticket gets reopened as soon as ticket is closed due to delivery failure message  from mail server due to incorrect e-mail ID, what can we do, unable to edit this information.

We are using  9.3  Build  9311

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