SBS 2008 - all updates installed
Awhile ago the company went through a few staff members leaving permanently and so I deleted the user account via SBS Console. Worked fine.
However now they have just started noticing that there was never any bounce back emails on the email accounts, they just seem to be received or dropped. The sender thinks its a valid email, the business doesn't know anything about it.
Is there anything that I can change to fix this? Its been well over 1 month for deleted mailbox retention so I can't recover.