Hello,
1) Everything in the user.usage is a monthly usage. It's all days combined.
It's counted by adding up all of the emails send in
/etc/virtual/usage/user.bytes
Note that duplicate message ID's are ignored.
2) The daily limits (triggered with email notifications to everyone) are done with:
/etc/virtual/usage/user
and are triggered when the size of the file exceeds the limit.
The actual cause of the size of the file can vary, and can be larger than the number of emails sent in the user.bytes file due to the fact the duplciate ID numbers are not removed for this case. (it's only so smart, but scanning for duplciate ID numbers before adding the byte to the "user" file woud take far too much cpu to do it for each message).
4) The limit in DA for email sends is a per-daily limit, but as mentioned in #1, the usage is the total number for the entire month.
3) If you have the lastest version of DA, you can see the daily usage (as counted in the user.bytes file) by going to:
Admin Level -> Show All Users -> user -> Bandwidth [Details].
The email info is in the far right column.
Again, the logged usage (user.bytes) in DA may be slightly different than the numbers reportd by the "user" file, due to the lack of duplicate ID checks.
Duplicate IDs can be caused by things such as message delivery retries.. forwarders sending to multiple IDs (which actually deserves the multiple send-billing anyway, since it's uses more bandwidth), etc..
John