For more information about SENDMAIL in a multi-domain environment-Linux Enterprise Application-Linux server application, see the following. I used to use MDaemon as an email server in a WINDOWS system, and then use sendmail in another LINUX system as another email server. I also used DNS services on this server. They are not in the same domain, and I have configured MX records under DNS. However, WINDOWS users cannot receive emails from LINUX users, but LINUX users can receive emails from WINDOWS users. I have heard that SENDMAIL can be modified to solve the problem, but I have never found a solution. Do you know?
This proves that my DNS is okay. The problem is that SENDMAIL cannot send emails across domains.
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