Automation works perfectly until change the IMAP trigger account

Questions
1

Hi,

I’ve built an automation in n8n that sends nurture emails to B2B clients:

  • Trigger 1: A new submission is created → an email is sent to the client.

  • Trigger 2 (IMAP): Listens for replies from the client → updates a Google Sheet when a reply arrives.

When I test with my personal email account ([email protected]), everything works perfectly. The IMAP trigger detects replies automatically and the workflow updates the Google Sheet.

However, when I switch to the department email account I actually want to use ([email protected]):

  • Manual executions work fine (the email is detected and the sheet updates).

  • Automatic executions don’t work — the IMAP trigger marks new emails as read, but the rest of the workflow never starts.

Both accounts use the same server and IMAP settings, so I don’t understand why one account works automatically while the other doesn’t.

Question:
Why would the IMAP trigger behave correctly for one mailbox but not for another on the same domain and server?

3

HI. The email account is new. Ive only made test emails and i deleted them each time. The inbox is pretty empty.

4

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