incoming/outgoing message limits

I've just run the exbpa tool over our environment and one of the issues it flags up is the incoming / outgoing message size is set to high (40mb), is this a real risk? What are the problems/issues with such a high value?

What if a user genuinely does need to send and receive large emails? if you configure it to default of 10mb can this cause more problems than it solves? surely there are instances whereby mail needs to be >10mb due to attachments..
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pma111Asked:
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Kent FichtnerConnect With a Mentor Information Technology Systems SupervisorCommented:
The main issue is that when you send large emails (and they go internal) they take up a HUGE amount of room.  One person sending an email of 40Mb to 10 people would use up almost a half Gb of space.  When there are large files that need to be moved, internal we use the fileserver and external (for artwork and tool plans) we use Citrix Share file.  

The other issue is that if you allow for 40Mb files and the person you are sending to allows for 10 Mb files, then you will get the kick back.
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pma111Author Commented:
is there flexibility though, if on rare occassions a user does genuinely need to send or receive a 40mb file, that the policy can be temporarily lifted for that user, or is a big piece of work to temporarily relax the setting then reset after the mail was sent or received?
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pjamConnect With a Mentor Commented:
Our limit with AT&T is 2MB, and that seems to work fine.
Anything larger needs to be done over FTP, or send a DVD.
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Kent FichtnerInformation Technology Systems SupervisorCommented:
To give someone higher size, in exchange 2007, you just go to the user's mailbox and open the properties.  Go to the mail flow settings tab and Message size restrictions and set what you want (in KB) there.
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