What are the risks of automation for deliverability?
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Automation is one of the best tools you have for email engagement. Set it up right and it runs quietly in the background, sending the right message at the right moment. Set it up wrong and it keeps running quietly in the background, sending the wrong message to the wrong people, indefinitely.
That's the core risk with automation. It doesn't stop to check itself. Here's what tends to go wrong.
Stale contact data. Automations can run for months or years without anyone touching them. If they're pulling from an old list or a CRM that nobody's cleaned recently, you're triggering sends to dead addresses, recycled inboxes, and people who haven't opened an email from you in two years. That piles up hard bounces fast. Make sure your trigger logic excludes contacts who haven't engaged in a meaningful window, and validate your data sources before wiring them to any workflow.
Sending to unengaged subscribers. Re-engagement and winback automations are specifically designed to reach inactive people, which sounds fine until you realize that sending volume to people who consistently don't open is a signal mailbox providers notice. If someone isn't engaging after a couple of attempts, sunset them. Continuing to send just chips away at your sender reputation without any upside.
Unexpected volume spikes. A viral campaign, a large data import, or a system glitch can suddenly push thousands of contacts into a workflow at once. That spike looks unusual to mailbox providers, especially if your normal sending pattern is much lower. Rate-limiting your automations and setting up volume alerts goes a long way toward catching this before it becomes a problem.
Broken workflows nobody notices. This one is sneaky. A bad merge tag pulls in blank fields. A link expires. A condition fires incorrectly. Unlike a campaign you review before hitting send, a broken automation just keeps going. Regular audits matter. Walk yourself through each workflow manually, check the metrics on a schedule, and actually test the unsubscribe path in every sequence.
Suppression gaps. If your suppression list isn't connected to every workflow, an unsubscribed contact can get pulled back into an automation and receive emails they opted out of. That's a compliance problem, not just a deliverability one. Every automation needs to check suppression status before firing, full stop.
The short version is that automations don't manage themselves. They need someone checking in on them regularly, the same way you'd check in on any campaign. If you're not sure whether your current workflows have any of these gaps, our SOS hotline is free and we're happy to take a look with you.
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