iCloud not retaining trash mail
I have my preferences set to retain trash mail for 1 month. However the trash is being deleted after 1 week.
iMac (27-inch Mid 2011), OS X Yosemite (10.10.3)
The preference you set on your Mail application is over-ridden by the website which deletes trash after a week. (If you set the Mail application to delete after for example three days, that would over-ride the website).