How to use sieve to send HTML email

Question

I am using sieve to send external notification emails about our internal emails.

if header :matches "X-Forward-To" "*" {
   set "forwardTo" "${1}";
   set :encodeurl "message" "Message";
   notify :from "[email protected]"
     :importance "1"
     :message "You've got mail!"
     "mailto:${forwardTo}?body=${message}";
   }
}

This works great until there are any html tags in the message. Then I receive plain-text emails with tags written out. Is there another function I can use other than notify? Is there a switch in notify? How do I use sieve to send HTML emails?

EDIT: To be clear, I don't simply want to redirect or forward the initial message; I want to send a notification with its own message.

EDIT 2: It looks like maybe it's just intervening mail exchange servers that are messing with me. The content-type: text/html tag might work otherwise.

Unknown Unknown · Accepted Answer · 2017-05-24T00:05:37

If it's going to work at all, you'd need to include the Content-Type header in the mailto URL, for something like this:

set :encodeurl "message" "Message <i>with HTML</i>";
notify :from "[email protected]"
  :importance "1"
  :message "You've got mail!"
  "mailto:${forwardTo}?Content-Type=text/html&body=${message}";

If you're running into issues doing that, then probably sending HTML emails via notifications is not handled by your mail setup or the mail servers en route.

How to use sieve to send HTML email

1 Answers