I would like to point out to developers that after install python3-html2text-2019.9.26-3.el7.noarch on CentOS7 because of:
Running with the internal HTML converter can result in performance issues with some HTML. Install one of the following utilitie
s with your package manager to improve performance with an external tool: w3m, elinks, links, html2text, lynx
We got blank emails. The situation was restored by just unistall python3-html2text. Atm I didn’t try the other suggested tools.