hostname problem after moving to different network

[gw1500se]

I’ve move a couple of my servers to a different network and am having a problem getting them to change their hostnames. They want to keep their original hostname even though the IP address is incorrect for the old name. When I run ‘changeip -checkhostname’ it shows the right IP address, the wrong hostname and an error that says “The DNS hostname is not available …”. Dig shows the correct name resolution in both directions. Where does this silly thing get its host name from and how can I fix this short of a reinstall? TIA.

[gw1500se]

Thanks. I finally got it. The original problem was related to postfix refusing to use the hostname but rather using localhost.localhost. Even after I got the hostname fixed with ‘changeip’ it still would not use the correct hostname. It turned out that that particular change required postfix to be stopped rather then reloaded. What I don’t get is why a reboot didn’t accomplish the same thing.

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