On Tue, 2010-10-05 at 10:40 -0400, Alex wrote: > I have an email that I'm trying to whitelist using whitelist_from_rcvd > and it's not working as I expect. I've created an entry: > > whitelist_from_rcvd u...@lanyon.com savvis.net > > Here is the corresponding received header: > > X-Envelope-From: <u...@lanyon.com> > Received: from S253906HZ1EW06.usstls6-hosting.savvis.net (unknown > [209.16.192.170]) > > Is it because there is no reverse DNS entry?
As the documentation [1] clearly states, the second value (a) is a string matched against the relay's rDNS in the Received headers, and (b) it is your MX's responsibility to perform the rDNS lookup and add it to the header. The latter is key, because despite "no reverse DNS entry" being ambiguous, there actually is an rDNS entry for the IP. In DNS, it's merely missing from the Received header. $ host 209.16.192.170 170.192.16.209.in-addr.arpa domain name pointer Lanyon.com. So, fix your MX. :) With an rDNS entry in the header, you will need to adjust your whitelist setting to use the actual rDNS, rather than the savvis.net HELO mystery. [1] http://spamassassin.apache.org/full/3.2.x/doc/Mail_SpamAssassin_Conf.html#whitelist_and_blacklist_options -- char *t="\10pse\0r\0dtu...@ghno\x4e\xc8\x79\xf4\xab\x51\x8a\x10\xf4\xf4\xc4"; main(){ char h,m=h=*t++,*x=t+2*h,c,i,l=*x,s=0; for (i=0;i<l;i++){ i%8? c<<=1: (c=*++x); c&128 && (s+=h); if (!(h>>=1)||!t[s+h]){ putchar(t[s]);h=m;s=0; }}}
