07/07/2026
Here is the exact logic of an abandoned cart flow that uses both Klaviyo email and Postscript SMS without sending your customer the same message twice.
This is the structure I use. Walk through it slowly because the timing and conditions are doing the heavy lifting:
Step 1 - Trigger: Checkout Started
Condition: Has not placed order in the last 4 hours
Step 2 - Wait: 1 hour
Step 3 - Conditional split: Is this person an SMS subscriber in Postscript?
- If YES: Send a brief SMS via Postscript (short, direct, link to cart)
- If NO: Send Email 1 via Klaviyo (full abandoned cart email with product image and urgency)
Step 4 - Wait: 20 hours
Step 5 - Conditional split: Has order been placed?
- If YES: Exit flow
- If NO: Continue
Step 6 - Send Email 1 (if they got SMS in Step 3) OR Email 2 (if they already got Email 1)
Step 7 - Wait: 24 hours
Step 8 - Final check: Has order been placed?
- If YES: Exit
- If NO: Send final email with stronger urgency or discount if your strategy allows
What this does: SMS subscribers get a text first, then a follow-up email the next day. Email-only subscribers get a proper email sequence. No one gets both channels firing at the same time.
The result is a coordinated cross-channel experience instead of two tools competing for the same customer's attention.
What does your current abandoned cart timing look like? Drop the hours in the comments.