You can customize attachment restrictions on your domain via the **Attachment Restrictions** option.

To begin customizing,

1. Navigate to **Attachment Restrictions** from the dashboard under **Incoming - Protection Settings**.

2. ![](https://app.chatwoot.com/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBCR0JKQmdRPSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--9bf56bdd2e21c8682be386f5d2e046440a02e3cf/%7B12DF3495-2083-48EC-A167-C3AE77C31009%7D.png)By default SpamExperts already have multiple extensions listed.

3. ![](https://app.chatwoot.com/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBCS2hLQmdRPSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--c3d8fbd40596f0c7d93d7f04d41454c2b0db8e0c/%7B91275E78-3158-440A-B51E-286320DDC073%7D.png)To add extensions manually, Add the extension name under **Add New Extensions.**\
   ![](https://app.chatwoot.com/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBCRzFmQmdRPSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--98f5b303ebde63184a3af237f733a1e2449ee51d/%7BF306D2B9-23F6-4470-999A-AD366EB82C5E%7D.png)Should you wish to **remove** the extensions from the block list, checklist the extensions and click **Remove Selected**.\
   ![](https://app.chatwoot.com/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBCUFJnQmdRPSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--49465e622a7145459a2e304046ab308166f1a3d2/%7BCAC8C28A-8D4D-481B-8FAC-3F0FD786EBEC%7D.png)

4. Finally, click **Save** at the bottom of the page.

   ![](https://app.chatwoot.com/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBCQSs4QmdRPSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--92ff18f713fd2c0db0d138f51dbec1deb5e44568/%7B5B9FCAC9-0D4B-4F07-8456-784F7652A696%7D.png)

* To disallow sender from your domain to release messages that contain attachments with certain extensions, go to the **Disallowed Release Extensions**.

  ![](https://app.chatwoot.com/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBCR210QmdRPSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--a4faedf28450d320ef97f82fa3ffd9287b7a682e/%7B4DEF549E-D123-4655-B24D-AA19BFE9FFA2%7D.png)

* Under Restriction Options

  You can block mail that has :

  1. Password protected files.

  2. Potentially unwanted attachments such as compressed executable files.

  3. Hidden executables.

  4. Attachments with macros.

  ![](https://app.chatwoot.com/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBCSlhiQmdRPSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--7d4ba0e47bc097ef5363f492f1fe6bd07917bbff/%7BDE714F52-BA2F-48E7-AFD7-61E9EE9A986F%7D.png)Don't forget to click **Save** at the bottom of the page after done checklisting.