CF Tunnel too many requests with mailcow

[hardy root]

What is the name of the domain?
mail.913aycltfm.com

What is the error number?
This page isn’t working

What is the error message?
redirected you too many times.

What is the issue you’re encountering
ERR_TOO_MANY_REDIRECTS

What steps have you taken to resolve the issue?
my tunnel is giving this error and i tried created a new tunnel and got a server and it gives me this error - This page isn’t working mail.913aycltfm.com redirected you too many times. Try deleting your cookies. ERR_TOO_MANY_REDIRECTS

[sleek cliff]

Feedback

Feedback has been submitted! Thank you :)

[elder mulch]

It looks like you have a redirect configured on your server, probably a http -> https redirect. Make sure you disable that.

[hardy root]

@elder mulch How do you do that?

[round yarrow]

Depends on your origin/web server behind Cloudflare.
If you're not sure, you can try configuring your tunnel/application route to use HTTPS rather then HTTP. If that doesn't work, need more information on what you're trying to setup

[hardy root]

@round yarrow it's a email server that uses mailcow running Ubuntu 25.10 on the Raspberry Pi 5 with 16gb of ram.

[elder mulch]

Is the tunnel only to access your webmail or to send/receive email as well?

[hardy root]

@elder mulch to access my webUI / webmail

[elder mulch]

Do you use the mailcow docker?

[hardy root]

Yes

[elder mulch]

https://docs.mailcow.email/manual-guides/u_e-80_to_443/

That has a HTTP_REDIRECT=y setting

except you want to disable it, not enable

so probably =n

[hardy root]

thanks!!!

[hardy root]

@elder mulch one more question, is there a way to fix a 500 Internal Server Error
nginx?