Preview and Render HTML emails, both in commandline or in a GUI web browser
mutt
vim ~/.muttrc
# open in gui browser: hit "v" then go down to text/html then hit "m" or "Enter"
bind attach <return> view-mailcap
auto_view text/html # view html automatically
alternative_order text/plain text/enriched text/html # list html for last
vim ~/.mailcap
# text/html; chromium %s; test=test -n "$DISPLAY"; needsterminal;
# text/html; w3m -I %{charset} -T text/html; copiousoutput;
text/html; "$BROWSER" %s; test=test -n "$DISPLAY"; needsterminal;
text/html; "$BROWSERCLI" -I %{charset} -T text/html; copiousoutput;
text/plain; cat %s; copiousoutput
_ _ _ _
__ _ ___ | |_| |__ | | ___| |_ _ _
/ _` |/ _ \| __| '_ \| |/ _ \ __| | | |
| (_| | (_) | |_| |_) | | __/ |_| |_| |
\__, |\___/ \__|_.__/|_|\___|\__|\__,_|
|___/