If your SendGrid automation isn’t firing after a CRM tag update, it’s likely due to tag-sync issues, automation trigger misconfiguration, or missing contact updates. Verify API sync, check automation conditions, and ensure your tag logic is correct within your connected CRM. Consistent field mapping and testing are key.

When you’re using SendGrid’s automation workflows—especially those triggered by CRM-based tag updates—you rely on precise data syncing to send the right email to the right contact. If your automation is not firing after a CRM tag update, the issue likely stems from one or more of the following areas:
1. CRM Integration Does Not Sync Tags Properly
Most CRMs don’t automatically sync every field or tag in real time—especially custom tags.
What to check:
- Are tags from your CRM actually syncing into SendGrid?
- Is there a visible Custom Field or Segment Condition in SendGrid that updates upon tag change?
Fix:
- Recheck your CRM-SendGrid integration settings.
- Use tools like Zapier, Make.com, or native integrations to ensure that when a tag is updated in your CRM, a corresponding field or segment in SendGrid is updated.
- Consider triggering an API call to SendGrid manually (via webhook) when a tag is updated.
2. Automation Is Set to Trigger Only on “First Entry”
SendGrid automations sometimes only trigger once per contact depending on your workflow setup.
What to check:
- Does the contact already exist in the automation?
- Is the automation set to allow multiple entries?
Fix:
- Go to your automation settings and check if it’s limited to first-time entries.
- If you expect recurring tag-based automations, configure the workflow to allow re-entry.
3. Automation Trigger is Based on List Addition, Not Tag Change

SendGrid automations are typically triggered by contact list addition or segment entry—not directly by a “tag” unless tags influence a segment.
What to check:
- Does the tag update trigger the contact’s inclusion in a dynamic segment or automation-triggered list?
Fix:
- Create a segment in SendGrid based on the tag (using a custom field or label logic).
- Set the automation to trigger when a contact enters this segment.
- Make sure the CRM updates the relevant field used by the segment.
4. Delay Between CRM Tag Update and SendGrid Sync
If your CRM and SendGrid are connected via a sync tool or API, there may be delays.
What to check:
- Check timestamps of when the tag was updated in the CRM vs. when the automation is supposed to start.
- Is there a sync delay or schedule (e.g., once per hour)?
Fix:
- Switch to webhook-based CRM updates if possible.
- Use an instant trigger (via tools like Zapier or Pabbly) to push updates.
5. Custom Fields Not Mapped Correctly Between CRM and SendGrid
A tag might be saved in a custom field, but if that field is not mapped or referenced in automation conditions, the automation won’t fire.
What to check:
- Open a test contact profile in SendGrid.
- See if the expected tag or custom field value is present.
Fix:
- Reconfigure your field mapping in your integration or sync tool.
- Ensure tag updates push data into a usable SendGrid field.
6. Segment Cache Not Updated Yet
SendGrid segments may not refresh instantly, especially if you’re relying on custom fields or tag-based logic.
What to check:
- Manually trigger a segment refresh.
- Add a time delay in your automation to allow for segment refresh.
Fix:
- Add a 5–10 minute delay before the next action in automation.
- In critical workflows, manually test the segment entry logic before live campaigns.
7. Contact Already Completed the Automation Previously
If the user has already completed the automation before, they may be excluded from re-entry unless re-entry is explicitly allowed.
What to check:
- Look at the contact’s automation history.
- Check if they completed the sequence before.
Fix:
- Set automation to allow multiple entries.
- Or use a fresh list/segment each time.
8. Incorrect Trigger Condition Logic
Sometimes your logic for entry conditions can block entries.
What to check:
- Are you using “AND” instead of “OR” in segment conditions?
- Are you checking against an outdated field value?
Fix:
- Simplify your logic: use single-field triggers or test one condition at a time.
- Use dummy data to test and validate entry logic.
9. Using Tags on External Systems Only (Not Passed to SendGrid)
If your CRM only updates tags internally (e.g., in HubSpot or Zoho) but doesn’t push them to SendGrid, your automation won’t get triggered.
What to check:
- Are you syncing tags or only emails?
- Is your integration configured to push tag metadata?
Fix:
- Use Zapier, Make.com, or Pabbly Connect to sync tag updates to a custom field in SendGrid.
- Then use that custom field as the trigger condition.
10. No Fallbacks or Testing Data
If you’re only relying on live user data and automations fail, you’re left without visibility into what went wrong.
Fix:
- Create test contacts with the right tags.
- Use the SendGrid Test mode or “simulate entry” options.
- Monitor test contacts with custom dashboards or logs.
Final Troubleshooting Checklist
- Did your CRM successfully update the contact’s tag?
- Did that tag push to SendGrid as a custom field or trigger segment?
- Is the automation trigger listening for the right condition?
- Can the contact re-enter the automation?
- Was there a time delay or sync lag?
- Is your automation running (not paused)?
- Is your field mapping correct?
Bonus: Tools You Can Use
- Zapier / Pabbly / Make.com – To sync tags to custom fields in SendGrid
- SendGrid Segment Builder – To create dynamic segments using field data
- Postman – For API testing and debugging
- CRM Webhook Support – To fire instant updates on tag change
How Socinova Can Help
At Socinova, we specialize in helping businesses streamline CRM automation, email marketing, and analytics. If your SendGrid automation isn’t firing:
- We’ll audit your CRM–SendGrid integration
- Ensure tags and custom fields are properly mapped
- Set up instant syncs via automation tools
- Build fallback logic to catch missing triggers
- Provide custom reports for automation health checks
No more missed leads, broken sequences, or manual tag headaches. Let’s fix your email automation—fast and reliably.
Learn more at https://socinova.com/discussions
Final Thoughts
An email automation failure after a tag update is frustrating—but solvable. In most cases, the issue lies in integration sync, trigger logic, or contact eligibility for automation.
By tracing your workflow step-by-step—starting from the CRM tag update to the segment inclusion in SendGrid—you can quickly pinpoint and resolve the issue.
Don’t just hope your emails go out. Make sure they do—with the right tech setup and automation logic.
Book your free consultation today.