Shopify Flow & Customer Segments: Emailing Existing Members and Automating Onboarding

Hey there, fellow store owners! Let's dive into a common head-scratcher that recently popped up in the Shopify Community forums. It's about a challenge many of us face when trying to set up automated emails based on customer segments, specifically when you want to reach folks who are already in a segment, not just the new joiners.

TiffanyChung, a store owner, brought this exact dilemma to the community. She was looking to create an onboarding email flow for customers who've made just one purchase – a fantastic idea for nurturing those new relationships! The goal was a fully automated process where newly added customers would get the onboarding email, and then, after a couple of weeks, those still in the segment would receive a follow-up. The catch? Shopify Flow was only triggering for customers who *newly joined* the segment, leaving existing members out in the cold. Sound familiar?

Understanding Shopify Flow's Segment Trigger

This isn't a bug; it's by design, as Moeed from the community pointed out. Shopify Flow is inherently an event-based automation tool. This means it springs into action when a specific event occurs – like a customer *joining* a segment. It doesn't continuously loop through a segment's existing members looking for people to act on. This is a crucial distinction that often trips people up.

So, if you've got a segment of 'One-Time Purchasers' and you create a Flow to email them, it'll only send to customers who transition into that segment after your Flow is active. The hundreds (or thousands!) already in there? They get skipped. Addison2 perfectly summarized this frustration, noting, "It only catches customers who join the segment after the flow is turned on, so the people already inside the segment get skipped."

Solutions for Reaching Existing Segment Members (The 'Backfill' Problem)

The good news is, the community offered some solid workarounds, depending on whether you need a one-off send or a fully automated, recurring solution.

1. The Hybrid Approach: Shopify Email for Backfill + Flow for New Joiners

This is often the simplest and most effective solution if you're looking to use Shopify's native tools. Moeed laid this out clearly:

Step-by-step for the Hybrid Method:

1. For Existing Members (One-Off Backfill):
   • Go to your Shopify Admin.
   • Navigate to Marketing > Email.
   • Click Create campaign.
   • When selecting your audience, pick the specific customer segment you want to target (e.g., 'One-Time Purchasers').
   • Craft your initial onboarding email and send it as a one-off campaign to all existing members of that segment.
2. For New Joiners (Ongoing Automation):
   • Go to your Shopify Admin.
   • Navigate to Apps > Shopify Flow.
   • Create a new Flow.
   • Set the trigger to 'Customer enters a segment' (and select your desired segment).
   • Add an action to 'Send email' (using Shopify Email or Flow Mail, as TiffanyChung mentioned).
   • Activate this Flow. It will now automatically send your onboarding email to any customer who joins that segment going forward.

This combo ensures no one gets missed: existing members get their initial welcome via a campaign, and all future segment joiners get it automatically via Flow.

2. For Truly Automated, Recurring Segment-Based Flows: Consider a Dedicated ESP (Like Klaviyo)

If your goal, like TiffanyChung's desire for a follow-up email after two weeks to *still existing* members, requires a more sophisticated, recurring, and segment-aware automation, an external Email Service Provider (ESP) like Klaviyo might be your best bet. Moeed specifically highlighted this, mentioning that Klaviyo handles segment-based flows that include all current members, not just new ones.

These platforms are built for complex customer journeys, allowing you to trigger flows based on segment membership (regardless of when they joined), add delays, split paths, and more. While it's an additional tool, for advanced segmentation and automation, it often pays dividends.

3. Manual Tagging for Backfill (A Bit More Hands-On)

Another approach mentioned by mastroke involves a bit more manual work but is certainly viable for a one-time backfill:

Step-by-step for Manual Tagging:

1. Export Your Segment: In your Shopify Admin, go to Customers, select your desired segment, and use the 'Export' option to get a CSV file of all members.
2. Add a Unique Tag: Open the CSV in a spreadsheet program. Add a new column (or modify an existing 'Tags' column) and assign a unique tag to all these customers (e.g., onboarding-email-sent-2024 or re-tag-segment-A). Make sure it's something you won't confuse with other tags.
3. Import Customers: Re-import this modified CSV back into Shopify. Shopify will update existing customer records, adding your new tag.
4. Build Your Flow: Now, in Shopify Flow, you can create a flow that triggers when a customer is tagged with your unique tag (e.g., onboarding-email-sent-2024) and then sends your email.

This method ensures that even existing members get tagged and can be processed by a Flow, though it does require that manual export/import step.

Leveraging Tags for Ongoing Management within Flow

Tim_1 brought up a smart point about using tags for ongoing management within Flow. While it doesn't solve the initial 'existing members' problem, it's excellent for building more robust, multi-stage flows once customers are *in* the system and being processed by Flow. For instance:

• Onboarding Tag: When a customer joins your 'One-Time Purchasers' segment and your Flow triggers, add a tag like onboarding-started.
• Flow Stages: Your Flow can then use conditions to check for this tag. For TiffanyChung's second follow-up email after two weeks, you could have a separate Flow that triggers, say, when an order is fulfilled (or a custom event, depending on your setup) and checks if the customer has the onboarding-started tag but *not* a onboarding-email-2-sent tag, then waits two weeks and sends the second email, adding the onboarding-email-2-sent tag.
• Removing Tags: You could also have a Flow to remove tags when a customer leaves a segment or completes a journey (e.g., customer-left-segment-X).

This level of tag management helps ensure customers progress through your desired journey and don't receive emails out of sequence or repeatedly.

As Maximus3 noted, a lot of this comes down to gaining experience with Flow's triggers, conditions, and actions, along with understanding how segments and campaigns interact. There are indeed many possibilities!

So, if you're trying to get those automated emails out to all your segment members, whether they're brand new or have been hanging out in that segment for a while, you've got options. For a quick backfill and ongoing new joiners, the Shopify Email + Flow combo is hard to beat. If you're looking for deep, recurring automation that genuinely considers all segment members at any given time, then a dedicated ESP like Klaviyo is worth exploring. And don't forget the power of tags to fine-tune your customer journeys within Flow!