[MM3-users] digest summary heavily cluttered with hrml code

Hi,

I am running Mailman 3.1.1 on Ubuntu 18.04.

The user complains that the digest summary is cluttered with HTML code. I thought, I may fix it by: Members > {user} > Member options > Delivery mode set to [Plain Text Digest]. After setting the value and clicking [save changes], I tried to check the value by getting back to Members setting for the user, it shows the value as "Regular", which was the value before I tried to update it.

Question 1: How may I be sure that the value is set, if it is set? Question 2: How may set it for all members of the list? Question 3: Is there a CLI way to do this? I tried "mailman members " command. But it seems not supporting this option.

Any help is much appreciated.

Thanks Mohsen