Unable to connect to Gmail

Service Issues
1

Description

Unable to connect to gmail account. Authenticating account returns error

To Reproduce…

Steps to reproduce the behavior:

  1. Go to preferences → accounts

  2. Select ‘re-authenticate’ or add new gmail account

  3. Go through connection steps, accepting app permissions

  4. Connection Error - Unable to connect to the server / port you provided. (IMAP)

Expected Behavior

Account to connect and begin loading emails in the client

Screenshots

Screenshot from 2025-09-16 11-01-55
Screenshot from 2025-09-16 11-01-551800×1200 101 KB

Setup

  • OS and Version: ubuntu 24.04.2
    • Installation Method: App Center / Snap
  • Mailspring Version: 1.16.0-5339a49f

Additional Context

I was unable to connect to gmail. Rebuild cache didn’t work. Re-authenticating created this error. Deleting the account and readding, returns the same error

2

I know this thread is old, but a recent system update just triggered this same SMTP connection bug on my end. After wasting an hour digging through forums without luck, Gemini helped me pinpoint the fix instantly. I’m leaving this here to save the next person some time.