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date: Tue, 8 Apr 2008 07:37:01 -0700,    group: microsoft.public.exchange.connectivity        back       


Recipient filtering over SMTP connectors   
I have a situation where I have to provide email connectivity over a low 
bandwidth (64k), unreliable satellite connection to approximately 400 users. 
I have configured two SMTP connectors between my main site and an exchange 
server at the remote site. One connector is for general transport and has a 
message size limit of 50k, the other connector is meant to be used for 5 
users who have to have the ability to accept large messages up to 1MB in 
size. I'm having problems with blocking or allowing transport over the 
connectors by recipient address. The incoming emails can be from anyone 
internal or external (internet) and have to be filtered based on size and 
recipient. If they are under 50k, they get sent over the first connector 
(lowest cost route) and if they are to one of the 5 special users, they can 
be sent over the 2nd connector. Exchange 2003 only allows one recipient 
filter, so I can't use it as the sort method. Is there any other way to block 
by recipient address? Any suggestions or ideas?

I have to use SMTP connectors as Routing Group Connectors have even less 
filtering/routing options.

Thanks,
Scott
date: Tue, 8 Apr 2008 07:37:01 -0700   author:   Scott S Scott

Re: Recipient filtering over SMTP connectors   
I presume Exchange 2000/2003 as you mention Routing Group Connectors.

Thus, enable Delivery restrictions on the SMTP connectors and assign 
Security Groups for who can use them.

Remember to set this key:  http://support.microsoft.com/kb/277872

Oliver
date: Tue, 8 Apr 2008 17:34:29 +0100   author:   Oliver Moazzezi [MVP]

Re: Recipient filtering over SMTP connectors   
That allows filtering of internal users sending internally or externally 
to/from that site, but is not capable of restricting external (internet 
originating) emails and routing those over the proper connector based on 
recipient.

Unless I'm missing something?

And yes, this is Exchange 2003 as mentioned in the original post.

"Oliver Moazzezi [MVP]" wrote:

> I presume Exchange 2000/2003 as you mention Routing Group Connectors.
> 
> Thus, enable Delivery restrictions on the SMTP connectors and assign 
> Security Groups for who can use them.
> 
> Remember to set this key:  http://support.microsoft.com/kb/277872
> 
> Oliver
> 
> 
>
date: Tue, 8 Apr 2008 10:04:01 -0700   author:   Scott S

Re: Recipient filtering over SMTP connectors   
Ahh I fully understand what you mean now. You won't be able to filter 
external recipient (Internet) addresses

Oliver
date: Tue, 8 Apr 2008 18:15:39 +0100   author:   Oliver Moazzezi [MVP]

Re: Recipient filtering over SMTP connectors   
Thanks for your help. Do you know of any other way or third party tool that 
would allow me to route traffic to a specific SMTP connector (or SMTP Virtual 
Server) based on the recipient address?

My only thought right now is to manually create a huge recipient filter 
containing all internal addresses at the remote site except for the VIP users 
and apply it to the large message SMTP Connector. It would prevent delivery 
of large messages to any of the non-VIP users over that connector, but seems 
very backwards, as well as being a huge administrative nightmare and bad 
solution, even if it would work. 

I guess what I'm trying to find is a Permit filter for specific recipients, 
rather than the Deny that the built-in recipient filter has.

Thanks,
Scott

"Oliver Moazzezi [MVP]" wrote:

> Ahh I fully understand what you mean now. You won't be able to filter 
> external recipient (Internet) addresses
> 
> Oliver
> 
> 
>
date: Tue, 8 Apr 2008 10:38:01 -0700   author:   Scott S

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