Can receive, but can't send emails

geburah

Hello!

I have a problem with Mailcow; I cann’t send mail but can receive it. I have tried to send emails using built-in SOGo app and with Apple Mail. In both cases, the email goes into the sending queue but is not sent.

Mailcow is installed according to the original documentation on a clean Debian 11 system. The Hetzner Cloud server was created before installing Mailcow and not used before.

Initially, I couldn’t even receive mail, but after reading the Mailcow documentation and searching in Google, I contacted Hetzner’s support and asked them to open the ports from this manual (https://docs.mailcow.email/prerequisite/prerequisite-system/#firewall-ports). This was 20 hours ago. About 20 minutes after contacting support, I starting receive emails (even got a few test emails sent a couple of hours before contacting support). But I still can’t send email.

Just in case, I checked the ports using the nc command from my laptop. It seems they are open.

I also tried double-checking the DNS records (they based on DigitalOcean). It seems everything is in order.

Additionally, I looked at the postfix logs but couldn’t understand the exact problem. For some reason, Google replies with “Connection timed out.” But it happens immideatly after I try to resend emails

What could be the problem? How can I set up sending mail?

pkernstock

geburah
I temporary moved the post to an internal topic, as you forgot to your hostname on your 2nd screenshot - and I supposed that’s not intended. Do you want to fix that before I move it back for public access?

geburah

pkernstock

Thank you for your help and attention.

Yes, I would like to edit the post and replace the image if possible. I have created a new image, but I can’t find the edit post button. Maybe it’s not available for regular users?

Here’s the new image:

Also, I figured out the issue with sending emails. This information might be useful for the community.

It turns out the ports were still closed by Hetzner’s side. Three days after requesting to open the ports, Hetzner’s support contacted me to clarify the volume of outgoing emails. After that, they opened the mail ports. Now email is sent and received without any problems.

I was also able to transfer mail from old mailboxes using imapsync.

pkernstock

When you click the three dots right-bottom, there should be Edit option:

I’ve edited the original post for you and will move the post back in the main forum, in case someone else faces the same issue at some point.

Regarding the issue: Sounds good! Glad to hear it’s working now.