ZipOut honors Outlook's settings for attachment blocking, including file extensions that you have added to the Level1Remove key and attachment blocking set by an Exchange Administrator.
Additional file extensions can be added to the blocked attachments list by clicking the Block Attachments... button on the ZipOut Configuration dialog To add a file type to the list displayed in the Block Attachments dialog box shown below, click Add and type the extension (without the leading . ) in the Input box. If the extension is registered on your system, its friendly name will appear in the list. Select an extension and click Delete to remove it from the list. Click OK to accept changes to the list of excluded extensions or click Cancel to discard changes.

| File Extension | Description |
|---|---|
| .ade | Microsoft Access Project Extension |
| .adp | Microsoft Access Project |
| .app | FoxPro generated application |
| .bas | Visual Basic® Module |
| .bat | Batch File |
| .cer | Security Certificate |
| .chm | Compiled HTML Help File |
| .cmd | Windows NT® Command Script |
| .com | MS-DOS® Application |
| .cpl | Control Panel Extension |
| .crt | Security Certificate |
| .csh | Unix shell script |
| .exe | Application |
| .fxp | FoxPro file |
| .hlp | Windows® Help File |
| .hta | HTML program |
| .inf | Setup Information File |
| .ins | Internet Naming Service |
| .isp | Internet Communication Settings |
| .js | JScript® File |
| .jse | JScript Encoded Script File |
| .ksh | Unix shell script |
| .lnk | Shortcut |
| .mda | Microsoft Access Add-in program |
| .mdb | Microsoft Access database |
| .mde | Microsoft Access MDE database |
| .mdt | Microsoft Access Add-in data |
| .mdw | Microsoft Access Workgroup Information |
| .mdz | Microsoft Access Wizard program |
| .msc | Microsoft Common Console Document |
| .msi | Windows Installer Package |
| .msp | Windows Installer Patch |
| .mst | Windows Installer Transform |
| .ops | Office Profile Settings File |
| .pcd | Photo CD Image or Microsoft Visual Test compiled script |
| .pif | Shortcut to MS-DOS Program |
| .prf | Outlook profile information (msrating.dll) |
| .prg | FoxPro program source file |
| .pst | Office Data File |
| .reg | Registration Entries |
| .scf | Windows Explorer command |
| .scr | Screen Saver |
| .sct | Windows Script Component |
| .shb | Shortcut into a document |
| .shs | Shell Scrap Object |
| .tmp | Temporary file |
| .url | Internet Shortcut (Uniform Resource Locator) |
| .vb | VBScript File |
| .vbe | VBScript Encoded Script File |
| .vbs | VBScript Script File |
| .vsw | Microsoft Visio Workspace file |
| .ws | Windows Script file |
| .wsc | Windows Script Component |
| .wsf | Windows Script File |
| .wsh | Windows Scripting Host Settings File |
| .xnk | Microsoft Exchange Shortcut |