Tip: Other languages are Google-Translated. You can visit the English version of this link.
Log in


How to block zip (files) attachments in Outlook emails?

As you know, when you receive an email with .exe attachments, the EXE attachments will be blocked to access automatically. However, some spammers compress their virus attachments as .zip files to prevent from being blocked. Here, this article will introduce the way to block all .zip attachments in Outlook emails.

Block zip (files) attachments in Outlook emails

Kutools for Outlook: 100+ New Advanced Tools for Outlook.
Office Tab: Enable Tabbed Editing and Browsing in Office, Just Like Chrome, Firefox, IE 8/9/10.
Classic Menu: Bring Old Menus and Toolbars Back to Office 2007, 2010, 2013, 2016 and 2019.

arrow blue right bubbleBlock zip (files) attachments in Outlook emails

This method will guide you to modify the security policy in the Registry Editor to automatically block specified types of Outlook attachments, such as all .zip attachments in Outlook.

1. Press Win + R keys together to open the Run dialog box, type regedit into the Open box, and click the OK button.

2. In the pooping out User Account Control dialog box, please click the Yes button to go ahead.

3. In the Registry Editor window, please open the Security key with below path:
Note: Above path works for Outlook 2016. Please change the 16.0 in above path to 15.0 for Outlook 2013, or change to 14.0 for Outlook 2010.

4. Right click the Security key, and select New > String Value from the context menu. See screenshot:

5. Name the new string value as Level1Add.

6. Right click the new Level1Add string value, and select Modify from the context menu. See screenshot:

7. In the popping out Edit String dialog box, please type the specified file extension into the Value data box, and click the OK button. See screenshot:

(1) To block all .zip attachments, please type .zip into the Value data box in Edit String dialog box;
(2) If you need to block multiple types of attachments simultaneously, please separate these file extensions with a semicolon, such as .zip; .jpg.

8. Please restart Microsoft Outlook.

And now you will see all .zip attachments are blocked automatically as below screenshot shown.

arrow blue right bubbleRelated Articles


Recommended Productivity Tools

shot kutools outlook kutools tab 1180x121
shot kutools outlook kutools plus tab 1180x121

Kutools for Outlook - More than 100 Advanced Functions for Outlook, Improve 70% Efficiency For you

  • Complicated and repeated operations can be done a one-time processing in seconds.
  • Forward multiple emails individually with one-click, and auto forward by rules.
  • Auto CC/BCC every sending email and easy for customizing rules, and auto reply without requiring exchange server.
  • Powerful junk emails filter, remove duplicate emails, reply with attachment, bunch of one-click operations, and so on...
  • 60-day unlimited free trial. 60-day money back guarantee. 2 years free upgrade and support. Buy once, use forever.
Say something here...
symbols left.
You are guest ( Sign Up? )
or post as a guest, but your post won't be published automatically.
Loading comment... The comment will be refreshed after 00:00.

Be the first to comment.