======Outlook behaviour when deleting messages from IMAP4======

When you delete a message in Outlook it marks the message as deleted (putting a line through it). You have to 'purge' the mailbox to actually delete the message.

See [[http://office.microsoft.com/en-us/outlook-help/purge-imap-items-marked-for-deletion-HP010080420.aspx|this Microsoft article]] for more information on this.

Note that other IMAP4 email clients such as [[http://www.mozillamessaging.com/thunderbird/|Mozilla Thunderbird]] have more options for deleting messages (eg Thunderbird has a choice of: move to 'deleted' folder, delete immediately, or mark as deleted)