This Microsoft Outlook add-on allows you to compress Email attachments. OutlookZIP integrates directly into the Outlook toolbar. It supports Outlook 2000 and newer versions. It does not work with Outlook Express. The created ZIP files can be open by standard ZIP programs, such as WinZip. OutlookZIP can also protect ZIP files with a password. It can also unblock same files types which are blocked by Outlook by default.

The license of this software is Free Trial Software, the price is $10.00, you can free download and get a free trial.