When a booking is created in TuCalendi, check if the email is valid with Email List Validation, and create a new lead in Maillbluster
When someone books a meeting in TuCalendi, this workflow verifies their email with Email List Validation and then adds them to Mailbluster as a new lead, with the check result ready to map or filter on.
TuCalendi
Email List Validation
Mailbluster3 steps Setup ~5 min Used on 2.2k sites Free to import

What this workflow does
People who book a call with you are good candidates for your email list, but copying each booker into Mailbluster by hand rarely happens. A mistyped address also means emails that never arrive. This workflow checks the address and creates the lead each time a booking comes in.
The TuCalendi trigger starts a run each time someone books one of your meeting slots. FlowMattic sends the booker's email to Email List Validation with its Verify Single Email action, and the response becomes data later steps can use. The last step runs Mailbluster's Create a New Lead action with the email and name you map from the booking.
As imported, nothing reads the verification result before Mailbluster. Every booking goes on to create a lead whatever the check says, so a failed address is still added. A Filter between the two steps changes that, as the tips explain. Edits and cancellations in TuCalendi don't run this workflow.
Consultants growing a newsletter
Prospects book discovery calls in TuCalendi. Each one becomes a Mailbluster lead you can include in your monthly newsletter.
Webinar or demo bookings
Attendees who book a demo slot are added to Mailbluster, where you can send them a follow-up sequence after the session.
Keeping fake bookings off your list
With a Filter added on the verification result, bookings made with a throwaway address stop before Mailbluster.
How this workflow runs
What happens at each step once the workflow is on, and what you need before you import it.
TuCalendi New Booking CreatedFires when a new booking is created in TuCalendi. The booker's details, including the email address, are passed to the next two steps.
Email List Validation Verify Single EmailVerifies the booker's email address with Email List Validation. Map the TuCalendi email here and connect your account. The response is available to map or check in the Mailbluster step.
Mailbluster Create a New LeadAdds the booker to Mailbluster as a lead. Map the email and name from TuCalendi, and add the verification result if you want to keep it with the lead, then connect your Mailbluster account.
What you need
- FlowMatticCore
- TuCalendi AccountAccount
- Email List Validation AccountAccount
- Mailbluster AccountAccount
After importing, map your own data. To keep the template universal, not every step is pre-filled. Open each step in the builder and connect your accounts and fields (channels, lists, sheets, recipients) before you switch the workflow on.
Make it yours
Changes worth making after you import it.
- Add a Filter between Email List Validation and Mailbluster that continues only when the result shows a valid address. Run a test booking first to see the exact value returned.
- Book a test slot in TuCalendi with your own address after import, then check Task History to see the fields from all three steps.
- If you take several kinds of meetings, add a Filter after the trigger so only bookings for the meeting types that suit your list reach Mailbluster, if the booking data names the type.
Questions about this workflow
Are TuCalendi bookers with an invalid email kept out of Mailbluster?
Not as imported. The verification runs, but every booking still reaches the Create a New Lead step. Add a Filter on the verification result to keep failed addresses out.
What happens if the booker is already a Mailbluster lead?
This template doesn't look the lead up first. How Mailbluster handles an address it already has isn't set here, so test with an existing lead and read the response in Task History.
Does a cancelled TuCalendi booking remove the lead?
No. Only new bookings run this workflow. TuCalendi's Booking Cancelled trigger is available in FlowMattic if you want to act on cancellations separately.
Should I tell bookers they'll be added to my Mailbluster list?
Yes. Mention it on your TuCalendi booking page or confirmation, and follow the consent rules that apply to your audience.
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