I have a 1 year old iMac with 4 GB of memory. I turned on Activity Monitor and noticed that the Mail application is using 2.5 GB of real memory, on average. I close the program, open it and it shows only 50 MB of real memory use. But it quickly climbs to 2.5 GB of real memory.
This seems abnormal. I have the latest update of the OS and the application. Any suggestions or comments?