Unfortunately we are in one of those small organizations that do not impose limits. It is the nature of our beasts, and luckily, the end user understands the trade off of having a 12 G mailbox.
I have a question in relation to Storage and I/O. Our users receive about 900 emails a day. Most of the 900 emails are sent to a distribution list that the users are members of. You can imagine how disappiointed I am to see SIS change! How is a message sent to a distribution list procesessed? Assume the users are spit between 2 Storage Groups (one database per SG). Does the message get written once to each log, then to each database, or does it get written once PER USER on the DL? I would think that would make a significant difference in disk i/o.