The Email Validation Filter: Your Insurance Policy Against LinkedIn Conversion Failures

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During a recent client implementation connecting HubSpot to LinkedIn via Zapier, we implemented a critical safeguard that prevents silent automation failures: an email validation filter between trigger and action steps.
Here's why this matters: LinkedIn's Conversions API relies exclusively on email addresses to identify and attribute leads. When contacts without valid emails enter your automation flow, the entire conversion tracking process can silently break without clear error messages.
The implementation is straightforward but powerful:
- Add a Filter step between your HubSpot trigger and LinkedIn action
- Set condition: "Email exists"
- This prevents records without emails from proceeding
This five-second addition acts as insurance against mysterious failures and provides clean error handling rather than broken attributions.
For marketing operations specialists managing complex tech stacks, these preventative filtering techniques separate robust systems from fragile ones that require constant maintenance.
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