Missing "Not deliverable" Mail with wrong E-Mail address

Community Support
1

Hello Community,

I’m running HestiaCP on oracle cloud with standard roundcube and exim4 mailserver.

Sending and receiving mails are working fine.

But I have this issue:
When I send an email from HestiaCP/Roundcube to an address that does not exist (e.g. @gmx.com), I do not get any info back.
When I send an mail with Gmail to the not existing address, I receive the “Not deliverable” mail.

What could be the problem? Is there anything extra that needs to be set here to receive mails on not deliverable?

Thanks for help
Tom

2

Oracle cloud blocks by default port 25

Use a smtp relay…

3

Sorry, I send you the wrong infos: I use Sendinblue as SMTP relay.

Sending Mails to an correct E-Mail address is not the problem. But when I made an spelling misstake and the address don’t exist on the receiving server I don’t get back an “Not deliverable” Mail.

4

It is the task of Sendinblue to notify you if there are issues with delivery.