first I want (of course

But (here it comes) the sent emails are not displayed correctly in some email-readers (claws-mail for example) because the html is not entirely correct.
The line break is <br/> whereas it should be <br> or <br /> (notice the space).
Additionally I would like to see the normal line breaks (\n) to be converted to <br> because the mail itself is declared html. And in html normal linebreaks are ignored (claws mail does do this).
Finally I would like to see the possibility to send pure text mails. A reply-To Feature would be great too

I know, I want a lot.

all the best!