Exchange 2003 - Make Mailbox Receive from Internal only

Hi

I need to make a Mailbox on SBS2003 deny all messages from external recipients. The account is used for sending out only, and is rarely checked for inbound mail. Of course despite warnings some people still insist on sending mail to this account!
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hongeditAsked:
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MegaNuk3Connect With a Mentor Commented:
Just add 'Delivery Restrictions' on the mailbox so no one can send to it
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williamvanerpCommented:
You can change the SMTP connector, allow only the ip's you want to receive mail from.
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hongeditAuthor Commented:
Hi

There is no SMTP Connector?

Also, I do not want to block external mais for all mailboxes - just 1
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Larry Struckmeyer MVPCommented:
Thinking a bit out of the box, the issue seems to be that mail in this mail box is not noticed.  Since there (apparently) is no way to allow outgoing and restrict incoming, I suggest you make this account part of a distribution group with an active account so the incoming mail goes to both.  In that way no mail will be missed, and the amount of mail coming to the unused account can be monitored and cleared as needed.
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williamvanerpCommented:
Aha, did you think about changing the mail address for that mailbox?
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hongeditAuthor Commented:
Well that was easy...
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Larry Struckmeyer MVPCommented:
I stand corrected (apparently) on the ability to block incoming mail, but this raises the question of weather or not you want to aggravate thi folks you deal with enough to send them an NDR, or worse, have their mail fall into a black hole.  I still think I prefer the Distribution Group.
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hongeditAuthor Commented:
Let me clarify why that is not possible:-

The AD account in actual fact only exists for a piece of CRM software to authenticate with the SBS Server in order to be able to send mail through it.

So you see, I couldnt use a DG, becuase DG's have no credentials to authenticate against.

The account though must be able to receive email from intenal users (well actually just itself) becuase it BCC's a copy of the mail to the account in question, for logging purposes.

They may well be investing in an autoresponder type software soon anyway, just wanted a quick fix.
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MegaNuk3Commented:
Thanks for the points ;-)
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