How to close Zimbra open relay?

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alexandrefrolov
Posts: 4
Joined: Mon Feb 15, 2021 2:37 pm

How to close Zimbra open relay?

Postby alexandrefrolov » Wed Feb 17, 2021 1:24 pm

Hello!
I have installed Zimbra 9.0.0 mail server with default settings and tested it on openRelay using check.smtp.bz service.
It turned out that the server is an open relay.

I read a lot of articles on the topic of how to remove an open relay in Zimbra, but I could not achieve that sending letters through the server's network interface, which has an external IP and is accessible from the Internet, required SMTP authorization.

As far as I understand, this is due to the fact that the address of this interface 212.xxx.xxx.xxx is written to trusted networks:

Code: Select all

postconf mynetworks
mynetworks = 127.0.0.0/8 212.xxx.xxx.xxx/32


Please tell me how to make sending mail via SMTP and the address 212.xxx.xxx.xxx require authorization?

That is, so that to send mail it was necessary to specify the sender's mailbox as a login, and his password as a password?
This assumes the domain and mailbox are created on my mail server.

Thank!


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