Question : Sending and receiving limits on Exchange users internally and externally

Question that we have been kicking around: We want to set a send and receive size limits on emails at our company. We would like to set an internal (@ourdomain.com) email size limit and set a different size limit on all external (@allotherdomains.com - Outbound) email. I see that we can set it by user or info store to all email, but cannot find a place to break them up as internal and external (outbound). Looking at setting all internal email at 1mb and external set to 20mb. Is this possible? We are running Exchange 2003. If it cannot be done in 2003, can Exchange 2007 do this?

Thanks for your help.

Answer : Sending and receiving limits on Exchange users internally and externally

Are there any Snapshots? You cant resize with active Snapshots.