David Saez Padros wrote: > Hi > >> I think you will find that the MX's for ols.es are indeed listed at >> backscatterer.org : >> >> Testresult for 78.129.233.52: >> This IP IS CURRENTLY LISTED in our Database. > > just thinking a bit about this: this is the kind of useless rbl > that seems more a revenge of the author against the world than > something useful (*) If you see how ip's are listed in this rbl > you will notice that both bounces and callouts are exclusivelly > done by real servers. So if you use it to reject anything from > those ip's you will mostly reject legitimate mail, if you use this > rbl to reject callouts then mail comming from your server to > the servers listed in this rbl will be rejected (because it will > fail the callout). In the other hand we do callouts with a special > username (not <>) to avoid problems with servers rejecting bounces > so you can use this rbl to reject callouts but you will not catch > our callouts (and many others). The only use of this rbl as a > blacklist is if you are under a ddos attack (*) > > If you read the arguments against callout it says that callouts are > a broken technique but that's not true (at most a deficient > implementation of sender callout could be broken) and the problem > he has is not about sender callouts is about people forging his > domain, which he can prevent by publishing spf records. Same for > backscatter, there is nothing in any RFC i have read that says that > bounces are only for local users, in fact what you can read in RFC's > about bounces is that you should accept them (another question is > that is obvious that is much better to reject at smtp time than > generate bounces) > > (*) Please notice that as this rbl only lists real email servers > in fact it can be used as a whitelist, which is the most useful > use i can image of it >
*sigh* What does your beloved callout do to 'avoid problems' when it runs into this: smtp_accept_max_per_host = 1 Saves the carbon budget if each registered class of fool would agree to communicate only with other fools registered in the same fool-class would it not? ;-) Bill -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
