Space usage for external messages with large attachments

[techseek]

Hello
A user has attempted to send to a list of external recipients a message with a large pdf attachment (100 MB) the receiving server refused it.
My question is, if say, the limits were set such that this large message was accepted, and the user sent several such messages,
Does Exch2010 hold 100 MB x #of recipients x number of sent messages in the database?
This concerns me space wise so I'd like to be clear on how it's handled in the store

thank you

 

[ShackDaddy]

As long as the recipients are external, only one copy of the message would be kept on the local server each time a message was composed and sent, without regard to the number of recipients. Indeed, even during the sending transaction, only one copy was physically in the queuing database. So, obviously, it's best to send them all at once than one at a time.

But if the user had sent such an attachment internally, it would have been 100mb x# of recipients, although the storage compression algorithm for Exchange 2010 is pretty good, so it would have taken up around 40%-80% of that space, depending on the file type.

Dave Shackelford
ThirdTier.net