Hi There,

I have a postfix installation based on the perfect SuSE setup. It looks fine, now even the SPF records are good and I still experience some delivery problems with my mails. I checked mail headers and it looks like that the Message-ID is invalid. For example one of my message ids is like:
Message-ID: <000601c83a69$1ad34690$6400a8c0@unknown>

My question is how could I set it up in a way that the @unknown gets replaced to the appropriate string, <mydomain>.com?

Thanks

Postfix usually says unknown when the client host IP sending the email does not resolve but you will notice that in the full headers of the email the ip address will be added within brackets. However if you want that info to show something you may define in /etc/hosts a name for your IP address so postfix would take that value from there instead of trying to resolve it through DNS.


Regards
Andy

Have a look into "append_mydomain" and "append_dot_mydomain" on postfix's site

http://www.postfix.org/postconf.5.html

It looks like the problem is not with postfix, SPF works fine and all other sites receive the mails. It looks like a microsoft specific problem as they look to be requiring non-standard whitelisting methods or they drop mails without any notification.

I started to look at SNDS now but their checker brings up my co-loc provider's e-mail addresses where thay want to send their mystic information and that e-mail address cannot be changed. I do not even know where they dig those data from which they show at https://postmaster.live.com/snds/addnetwork.aspx. I did not find information about SNDS on wikipedia.