[solved] Email Channel Setup - Gateway timeout

[cloudy]

Infos:

Important:
If you are a Zammad Support or hosted customer and experience a technical issue, please refer to: support@zammad.com using your zammad-hostname / or company contract.

• Used Zammad version: 2.6
• Used Zammad installation source: (source, package, …) Zammad Docker Compose
• Operating system: ubuntu 16.04
• Browser + version: Firefox 63

Expected behavior:

• Email channel setup completes ‘verify sending and receiving’

Actual behavior:

• ‘verify sending and receiving’ fails with a 504 gateway timeout error

Steps to reproduce the behavior:

• Zammad docker, used with nginx-proxy and letsencrypt-proxy-companion for SSL certs.
  I believe that that the nginx-proxy is causing the timeout. Has anyone had a similar error and managed to resolve it?

Thanks!

[MrGeneration]

Coud you please provide the production log?
Normally the Communication to the E-Mail-Server is not handled by the nginx-proxy.

[cloudy]

Turns out someone decided to add a filter to that particular gmail account… and it was catching the test email Zammad was sending.

Cheers!