On Fri, 6 Apr 2018, Maupertuis Philippe wrote:
Hi list Due to misbeaving client , I want to rewrite the message received on the first central sever with the name corresponding to the source ip address. I am using fromhost for that and it works so far. However I am wondering what is the value of fromhost if the dns couldn't resolve the ip address ? I failed to find any specification for that case and would like to know how to test it has failed, probably to replace by fromhostip.
If a name lookup (DNS or /etc/hosts or whatever else is defined in /etc/nsswitch) fails to return a name, the IP is returned, so fromhost will then be the same as fromhost-ip
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