|Component:||Microsoft Exchange Message Transfer Agent|
|Message:||Unable to allocate memory. Domain defined attribute allocation failed. [<value> <value> <value> <value>] (12)|
The message transfer agent (MTA) has failed to allocate and reserve memory from the operating system.
Use Performance Monitor to determine if a particular item is taking up too much memory. To allocate more memory, close any nonessential applications. You can also increase the physical or virtual memory of your system. Verify that there is enough disk space for the paging file to grow.