Thanks,

I don’t think I have a major issue but the devils in the details.

@Eric,

Let me update the article for CentOS Stream 9…

I’ve used this setup for several years on CentOS 7 and it works great. I am using a similar setup on CentOS 9 Stream. I wanted to ask if you have any references for me. I am getting a generic “mail server configuration error”. I would like to get this resolved and move to the new server.

Any help would be appreciated. You can email me directly if you prefer.

Thanks in advance.

Followed your step for SpamAssassin for postfix. It is working perfectly for two of my mail servers but one mail server (with the same config) not marking spam mail. I am puzzled. How to debug this? Where is the problem?

Thanks in advance
Nirjhar, Dhaka, Bangladesh

Bruce,
Thank you for taking the time to report back on the solution you found!