Am 06.04.2012 18:38, schrieb Heinz Diehl: > On 06.04.2012, Reindl Harald wrote: > >> anybody out there must not open port 25 from the internet >> becuase he was able to type "yum install postfix" > > In this case, one must indeed have opened port 25 manually, since "yum > install postfix" does not install any postfix configuration which has > port 25 opened by default. i forgot the <sarcasm> tags yes it is easy to remove the # in "master.cf" after "yum install" but if this is all somebody does after install a MTA and make him listening on WAN interfaces he should stop what ever doing amnd reading many manuals before or outsource the task to people knwong how to setup public mailservers there is no single excuse for a open relay these days not for a single second ona wan interface public servers have to be tested and secured before they see the first time internet connections and by the hugeh damage open relays are doing all over the world this is the most important rule for mailservices
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