Frankly, the email functionality is Mixpanel's weak point. Composing rich HTML emails is really painful and any tracking links need carefully to be individually hand-crafted and tested. Add to that the relatively poor analytics/metrics and, well, it's not wonderful.
We'd like to be able to build triggers in Mixpanel, but have the emails actually sent via a 3rd party, such as Campaign Monitor or Mailchimp.
This answer seems to have half of the problem: getting data from Mailchimp into Mixpanel.
For the other half (triggering emails to be sent) I think we'd be looking at using Webhooks, but can't find any detailed info on this.
Has anyone done this? Am I on the right track? What's my next step?