Have you been migrated to the new email format? If so, there are no deletion schedules you can change. With the exception of the Spam and Trash folders, all messages are now kept until you delete them.
Yup, on the new and improved? version. Rarely look at email online but checked in today when Comcast was nice enough to RE download the last six months of my email. So I had one read and one unread email when I opened T-Bird. Spam and all. Oh what a joy that was. Thanks for the response. Was afraid that was the case. Guess I'll just have to set a reminder to go, online, every couple months and "select all" and "Deliete" Thanks again Latoque.
Legal in CA. Eeha