Sun’s Java Enterprise System mail facilities have the capacity to provision users based on predefined classes of service (COS) which specify the types of services a user assigned to that COS can use, their mailbox size quota, number of message quota, and per message size quota. However, because the mailQuota attribute is stored as a 32-bit integer, the maximum value is 4,294,967,295 bytes (4GB). This tech-recipe describes a way around this limit.
Faced with a client who wanted to set a limit on emails but needed a limit larger than 4GB, I started digging around. I found a reference to this that it will accept values for quotas in a unit format as well. Valid units are K for kilobyte, M for megabyte, and G for gigabyte. For example, to set a 10 GB quota, use
mailQuota: 10G
