Disable vs. delete user account and what happens to future incoming mail to that address?

ON SBS 2003 R2, I am embarrassed to be asking this - it seems so trivial.. so much so that I can't seem to even find the answer on the web.

a user leaves the company.  You want to disable their access, remove their name from the GAL and have emails either

a) bounce like any other invalid address
b) get forwarded to a different user.

my question revolves around disabling vs. deleting the user account.

which if either / both will cause the mail to bounce (or black hole - I know that's a setting on the exchange part of SBS)?

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Brian PiercePhotographerCommented:
Yes - If the account is disabled or deleted then the email will just be treated as it would any invalid address.

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Once you have deleted the user account and corresponding email address, you could "add" the old address as an alias to another user, if you wish to keep receiving the emails for the deleted account.  
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Windows Server 2003

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