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Re: Multicast & SMTP question

Subject: Re: Multicast & SMTP question
From: "Warren Brunk"
Date: Mon, 11 Sep 2006 16:27:38 -0700
Newsgroups: microsoft.public.sqlserver.notificationsvcs

When multicast delivery is enabled, the delivery protocol receives the 
formatted message once with a list of subscriber information. The delivery 
protocol must be able to use the recipient list to send the formatted 
message to multiple subscribers. It can do this either by sending a single 
message, if the network protocol supports true multicast delivery, or by 
simply iterating through the subscriber list and sending the same message to 
each subscriber.

SMTP - If you use the BCC in Smtp all recipients will be blind the the other 
users. A better way might be to iterate through and send one email at a 

Does that help?

Warren Brunk - MCITP - SQL 2005, MCDBA

"CoreyB" <[email protected]> wrote in message 
news:[email protected]
>I have a question that needs clearing up.  I know that I do want to use
> the multicast feature.  Our app is such that we may have thousands of
> users subscribed to one specific event, so clearly we don't want to
> format thousands of times.  We want to format just once, to save
> resources.
> We are using the SMTP delivery protocol - so my question is:  if I send
> the same message to 1000 subscribers using multicasting - is this going
> to put all of my subscribers' email addresses in the email header??
>>From Shyam's book:
> "If the network protocol provides a way to send as single message to
> multiple recipients, the delivery protocol can use this facility".
> Clearly SMTP allows this - you see it all the time when you send an
> email to multiple people.  But I don't want other subscribers' data
> visible - only the subscriber meant for the message.

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