Send email and wait for response

Hi Team,

I have a requirement to send email outside our organization with an embedded link to either accept or reject the mail. Once the recipient receives the mail, he/she should click on the link which would open up a page for the user to either accept or reject the mail. This information then has to be passed back to Appian and the work-flow to be continued then.

This email response from user is time-bound. If within specified time the user does not respond then the default work-flow is to be followed.

We don't want to use a delay timer. We would like these processes to be asynchronous.

Can someone suggest me how to achieve this?

Any help is appreciated.

Thank you!!