You can set the "Require that all senders are authenticated" attribute. http://christoph.holas.name/blog/2012/01/how-to-enable-a-mailbox-or-distribution-group-to-receive-mail-from-external/
From: [email protected] [mailto:[email protected]] On Behalf Of Jump, Stewart Sent: Sunday, April 6, 2014 6:09 AM To: '[email protected]' Subject: [Exchange] RE: Reject all inbound email to specific mailboxes If you want a reject and aren't worried about the text of the reject set the maximum message size to 1KB ********************************************************************* If you receive this e-mail in error, please contact +44 20 7280 5000. The information contained in this e-mail and in the attachments if any, is confidential. It must not be read, copied, disclosed, printed, forwarded, relied upon or used by any person other than the intended recipient. Unauthorised use, disclosure or copying is strictly prohibited. N M Rothschild & Sons Limited Registered number 925279 Registered in England at New Court, St Swithin's Lane, London EC4N 8AL N M Rothschild & Sons Limited is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority in the United Kingdom. The firm reference number is 124451. ********************************************************************* From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of xyz Sent: 06 April 2014 00:13 To: [email protected]<mailto:[email protected]> Subject: [Exchange] Reject all inbound email to specific mailboxes Greetings EXCHANGE 2010 SP3 UR3 Hoping I can explain this properly. I have several user accounts where the user is no longer here ( disabled in AD but required to maintain for legal) , and I placed each mailbox under the EXCHANGE Litigation hold. I am seeking to "reject" all incoming messages to these mailboxes - as any new messages are not subject to legal, but each mailbox size continues to grow with the typical junk and incoming email. I know how to set rules in Hub Transport for each mailbox, or even logging into the mailbox to set the rule. I also believe I could set up a "policy" to deal with this, but I prefer to deal with each mailbox individually since this is a very small subset of my user mailboxes. My google searches generally come back with older versions of EXCHANGE so not trusting. Ideally, I would like to just run an EXCHANGE PS command on each mailbox that would set an attribute to reject inbound email to each mailbox so the message would never be delivered to the mailbox and data store. Again, sorry if unclear, but please let me know with suggestions or questions. Thank you Dana
