On IBM SystemX servers, there is a thing called an IBM Management Module (IMM), which is basicly a mini-OS on a seperate Network-Interface, accessible via a Web-UI. This is very handy, because you can monitor & troubleshoot the server, independet of the status of the server-OS.
The IMM on my server has just one nasty problem: sending email notifications is poorly implemented. Apart from the inability to send it encrypted, which is why I installed a postfix on the network to relay those messages to our ISPs mailserver, it also sends mail with a FROM address built with the content of the mailserver-field as the domain name.
So in my case, the postfix runs on 192.168.1.7 and ideally, I would like to put this IP address in the mailserver field, so the connection is DNS-independent. Because our internal DNS sits on a virtual windows machine, which is far more likely to have problems, than the small and hyper-stable virtual debian machine running the postfix.
The problem is, that the stupid IMM then sends it's emails as [email protected] which causes the postfix to complain:
warning: Illegal address syntax from unknown[192.168.1.250] in MAIL command: [email protected]
Alternatively I can put in the DNS server in the IMM configuration and as the mailserver I put in the local FQDN of the debian server (debi.domain.local) and everything works, because my postfix is configured to rewrite the [email protected] address to something our ISP-mailserver accepts.
BUT
I would prefer to have the mail-transport between IMM and postfix independent of our internal DNS server. So the question is:
Can postfix be configured, to accept incoming mail from xyz@IP-ADDRESS ?
