Currently Being ModeratedNov 15, 2013 11:19 AM (in response to Ellen23)
Welcome to Apple Support Communities.
In Snow Leopard, OS X 10.6.8, deleted emails are erased within the Mail program, not the Trash Bin.
Mail, Mailbox, Erase Deleted Items, In All Accounts...
NOT ILLUSTRATED ABOVE -- You can also select email accounts individually, and erase deleted items, if you have more than one account.
Currently Being ModeratedNov 16, 2013 4:57 AM (in response to Ellen23)
Check your Mail Preferences > Accounts (your account) Trash : and have selected 'Move deleted messages to the trash mailbox', and have 'Permanently delete messages' to a setting other than Never. See how that works,