Discourse was installed on an Ubuntu 20.04 computer. Everything is running smoothly. However, we are having trouble with the email trigger; emails are not being sent or received. We are operating a docker container-based application called Discourse. Getting net Read out error. No logs of sent or bounced have been collected.
I have rebuilt the forum and tested in all the possible ways.
I have tested the SMTP server with Telnet:
Telnet connected to the SMTP server. It was working but not working on the forum. Done all the trouble shooting.
Hi Poorvi! And welcome to our community! 
Can you confirm you followed the official install?
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Hi @tobiaseigen
I have followed the steps mentioned in the below attached link for installation.
https://linuxways.net/ubuntu/how-to-install-discourse-on-ubuntu-20-04-lts
Only the official install is supported here. I recommend you try again using the official install instructions. Let us know how you get on!
Though that’s not the conical official install page, it’s still the same thing.
Have a look at
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