There are not problem when Outlook send email without attachment or attachment below 100KB size, however it show error 0x800CCC13 "Cannot connect to the network. Verify your network connection or modem" when send out email with more than 100KB size of attachment.
The problem still occurs after sfc \scannow, finally the problem solved with these steps.

Steps to fix Outlook error 0x800CCC13
Outlook show error 0x800CCC13 when sending email with attachment which more than 100KB size.

Press Windows + R to show Run dialog box, and type "temp"at Run dialog box.

It will show dialog "You don't currently have permission to access this folder". Click "Continue".

Step 4
Windows explorer will open Temp folder, press Ctrl + A to select all folder and files, press "delete" key to delete all files.