Blocking CSS in Emails

Some email clients such as Thunderbird allows the user to only compose email in text, without HTML or CSS.

Would it be possible to both retain and sent emails in only text format in the Communications core?

At the very least, on this subject, the ability to disable all css in any email message is good security and safety!? Gmail for example blocks css in mail.

I am unable to determine a way to easily do this at present.

There are a number of reports where inline css are causing issues on the platform such as underlined blue links and this is related to css in emails breaking the default css system.

Looking forward to any reply in this regard.