We have added an update to the Email Groups feature that we launched a couple of weeks ago. You can now embed a poll or a survey into an email, so the recipient can submit their response directly from the email.
Just use the
[poll] shortcode to embed a poll in the email, or
[survey] shortcode to embed a survey. More on how to do this can be found on the support page.
Polls and surveys are then embedded directly in the email as a form without the need for any other code. This should should work for all email clients, although if you find one that doesn’t work please do let us know.
Note: A survey/poll can be embedded in the email but submitting it will open an external page!