Wow, this is an old topic.
Integration with a locally installed emailer (e.g. sendmail or postfix) is available OOTB from the settings -> email panel.
I have a HTML template that I'd like to use for my emails when a user has to confirm their account, however so far I have seen no way to actually implement this. I know I can change the text from /public/language/en_GB/email.json however this provides no way for me to add in any HTML (or does it?).
Any help is appreciated,