How to completely disable mail shield?

How to completely disable mail shield? or just disable outgoing & incoming option? cause every time when I unchecked the box, when time passed the checked boxes automatically reverting back to checked again and again. It happened in all 3 vms that I installed AVAST.

Under Settings > Troubleshooting

https://d1ka0itfguscri.cloudfront.net/Lh/2022/03/16/20/51/c3eDY7VFBBY/preview.jpg

Once you select Add/Modify, uncheck Mail shield and then select change.
When that finishes, restart the computer.