Integrate with Calendly
Integrating with Calendly takes no more than inserting your Calendly link to the body of your email. Below is a sample:
When your prospect books an appointment with you via Calendly, you receive the email notification for it.
Quickmail will then detect the email notification and the prospect will be marked as "Responded" (follow-ups are canceled automatically).
When you view the prospect, you'll see a note that says "* Prospect booked an appointment on Calendly *"
NOTE: Follow-ups will only get automatically canceled if the prospect booked under the same email that he has on your list.
You can always argue you missed the booking if the prospect uses another email, so should not be too harmful if missed.
(it may be worth a quick double check to see if the prospect used the same email address)