Orphaned external contact

I have an account that previously had email forwarded to an external (home) email account. Instead of removing the delivery options from the user account and then removing the contact in AD, the contact was erased first. Now whenever someone sends her an email she gets a system admin message:

Your message did not reach some or all of the intended recipients.

"The email account does not exist at the organization this message was send to. Check the email address, or contact the recipient directly to find out the correct address.
<(mailserver) #5.1.1>

What to do?

Who is Participating?
sandeep_narkhedeConnect With a Mentor Commented:
Change the forwarding contact to something else & then revert to no forwarding. If this cannot resolve then remove the forwarding rule from mailbox using MFCMAPI
Do a telnet locally and drop an email to the user,see if he gets it.
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