I have set mailbox size limits for individual users. I then set default storage limits for the database. Shortly after applying the default limits I got a call telling me that e-mail was being rejected because the receivers mailbox was full. The users mailbox was only half full. When I removed the default quotas this person could receive mail again. I have verified that this user is not exceeding her limits. Here is an example. I set this users limits to Issue warning at 400MB, Prohibit send at 500MB, Prohibit send and receive at 600MB. I then set the default settings to 100, 200 and 300MB respectfully. Shortly after I applied these settings I got the phone call.
Needless to say I am a little nervous about reapplying these setting. Any ideas?