Sending 200 emails with N8N: I need to slow down the workflow, right?

Hey! A question for all cold-campaigners out here!

For a client workflow, I need to send 200+ emails from a personalized database I built through scraping.

Flow: Google Sheets (database) → n8n Code Node generates the personalized email → Gmail node sends → then updates the sheet with “sent”.

But… thinking out loud: sending 200+ emails via n8n could be a problem because of send speed, right?On volume I’m not too concerned (I know Workspace can allow up to ~2K/day), but what about sending too fast (which is what this workflow is gonna do for sure)?

For those experienced running cold campaigns through n8n:If n8n sends emails back-to-back with no delay, can Gmail/Workspace flag / rate-limit / suspend due to “suspicious behavior”, even if the volume is within limits?

What I’m thinking to do:

Use Split In Batches (batch size 5–10)
Add a Wait node (delay 30–60s)
Then: Code node → Send mail → Update Google Sheets row (“sent”)
Loop batches until no items remain

Normally I’d use Mailchimp / Mail Relay for this, but in this case the list is scraped from public data, so the client doesn’t want it inside a newsletter tool.

What’s your experience sending solely through n8n + Workspace?If you’ve done this, what timing / batch size worked for you?

Thanks!

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