- Purging emails already marked for deletion in Outlook 2007
Click a folder in your IMAP e-mail account.
In the Edit menu select Purge Deleted Messages and choose one of:
Click Purge Marked Items in "folder".
Click Purge Marked Items in "e-mail account".
Click Purge Marked Items in All Accounts. - Automatically purge emails when you change folders:
Click a folder in your IMAP e-mail account.
In the Edit menu choose Purge Deleted Messages.
Click: Purge Options.
In the General tab under Purge Options select the Purge items when switching folders while online checkbox. - Hide Strikethrough Messages in Outlook
Open your Inbox folder.
Go into the VIEW menu. Open View - Current View.
Select the option: Hide Messages Marked for Deletion.