Changing the email templates to only use text would require building new message template packs that did not use html. Here’s a link to the developer documentation that outlines how to get a new message template pack started:
One approach that could work for you is you copy the default template pack, register it as a new template pack in its own plugin, then remove all of the html from it and replace with text.
The support post ‘How to send text only email’ is closed to new replies.
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