Connection could not be established with host mail.domain.com [Connection timed out #110]

[humptydumpty]

Maybe I should open all of these too (except for "any"). I do use SSH and 53 for the DNS makes sense. IDK about the MYSQL and PGSQL though.

[humptydumpty]

@girish That didn't help. I still can't send the test email in FS. Here's what I have activated in the Hetzner firewall. Server is up though so you're right, it does block all unless specified.

[girish]

@humptydumpty are you using Cloudflare? I can't think of any other reason

[humptydumpty]

For the mail server domain, yes. The mailbox (different domain) is using Bunny. Proxy is off though. CDN acceleration is disabled in Bunny DNS. I didn't change anything at all when this issue started. It's been working fine. I use FS daily. Also, mail is working fine in Roundcube so DNS, ports, wtv are correct. It's FS that's picky, no sending/fetching of mailboxes. Oh, and I have multiple mailboxes using domains on Cloudflare and Bunny. Issue is the same for all. Issue is the same on a fresh FS, so it's not module related either.

Under manage > mail settings > system emails > send test to --- This test email is sent and received fine!

[girish]

@humptydumpty the system email is configured by cloudron itself. You can ignore this (for this problem).

One thing in your screenshot: I noticed now that FS has changed it's TLS options (very nice). You have to choose STARTTLS for port 587. In yours it is none.

[girish]

[humptydumpty]

The docs still say to use none if CR mail and FS are on the same server (which they are for my case). I updated it to TLS, but issue persists. I even restarted the app with no effect.

[girish]

@humptydumpty the docs are a bit outdated since FS has changed the Encryption options. I will fix that once we resolve this... I am out of ideas now though. Can you send us an email to support@cloudron.io with the domain? It must be something very obvious because our FS works.

[humptydumpty]

@girish Sent.

[humptydumpty]

@girish I'm not sure if you got my email as I sent an email (proton email) to my CR email (roundcube) and I didn't receive it. I deleted the Hetzner firewall (as I've had it this whole time) and then sent a new email and then it was received in Roundcube.

[girish]

@humptydumpty thanks.

Just as an update: we found that for some reason, the docker containers (any of them) are unable to reach any port other than port 443/80 using the public IP. From the server itself, all ports of public IP are reachable... Have to debug this further tomorrow.