The Costly Mistake Most Marketers Make
Pretty much every email marketer makes the exact same mistake when upgrading their automations. You build a brand new, beautifully designed sequence to replace an existing one. Then, you flip the switch on the new version and immediately set the old one to Draft.
That is a mistake.
When you turn off an automation immediately, you forget about everyone currently moving through that journey. If someone is halfway through a 3-email abandoned cart sequence and you flick the switch to draft, they simply drop out. They never receive the remaining emails, and they do not automatically start your new sequence either.
Why Abrupt Shutoffs Kill Flow Revenue
Automations are not static broadcasts. At any given moment, you might have dozens or even hundreds of people waiting between time delays in your abandoned cart, browse abandonment, or post-purchase flows.
If you cut them off mid-stream, you instantly kill the momentum of that sequence. In my books, cutting off someone who is 24 hours away from receiving an objection-handling email or an incentive is just throwing away conversion revenue. It creates an unnecessary revenue dip that can last for several days while the new flow warms up with fresh recipients.
How to Safely Phase Out an Old Flow
Unless an old flow has fundamentally broken links, wrong discount codes, or incorrect branding that poses a legal risk, you should let active subscribers finish their path. Here is the process we follow at In-box when replacing automations.
1. Turn on the new flow
First, verify that your new automation is set up properly with all triggers, filters, and dynamic blocks in place. Set the message statuses to Live so incoming triggers start routing people into the new experience immediately.
2. Add a conditional split to the top of the old flow
Open your old automation and drag a conditional split directly underneath the main trigger, before the very first email or time delay. Configure the split to block new entrants from progressing down the email path. One simple way to do this is using a random sample set to 100% down a dead-end branch.
3. Keep the old flow live
Leave the old flow turned on. Any new customer who triggers the action will enter both flows, but on the old flow, they immediately hit the top conditional split and exit without receiving duplicate emails. Meanwhile, subscribers already sitting further down the old sequence continue through their remaining steps undisturbed.
When to Finally Archive the Flow
You do not need to leave the old flow running forever. Check the total duration of your old automation from start to finish. If your sequence spans 7 days, wait roughly 8 to 10 days before archiving it.
Once the analytics show zero active recipients waiting in the time delays, you can safely turn the entire old flow to Draft and archive it. This ensures every single customer completes their full sequence without sacrificing a single conversion.
Final Thoughts
Upgrading your automations should increase your revenue, not create a temporary revenue drought. By using a top-level split to drain an old sequence gradually, you protect the customer experience and keep cash flow steady.
If you want help auditing, redesigning, or building high-performing lifecycle automations for your store, explore our Email Automations service.
