Mutt is awesome but html email not so much… well, let me give you a possible solution: create a hotkey (F) to open html email in your favorite browser.
macro attach F \
"\
<enter-command>unset wait_key<enter>\
<shell-escape>rm -f /tmp/mutt-attach<enter>\
<save-entry><kill-line>/tmp/mutt-attach<enter>\
<shell-escape>$BROWSER /tmp/mutt-attach &<enter>\
"
/comments ~lucasemmoreira/opinions@lists.sr.ht?Subject=Re: Mutt's glasses for html email