Jakob Hirsch wrote: > Quoting Larry Rosenman: > > >>>> Nov 8 08:12:24 thebighonker exim[32310]: H=5.ctyme.com >>>> (pascal.ctyme.com) [69.50.231.5]:35579 I=[192.147.25.65]:25 >>>> Can you get the rDNS to be more legitimate? >>>> >>> What's wrong with that rDNS? Is it because of the 5? That seems like >>> a bit of an overzealous rule on your part, Larry. >>> >>> - Marc (not Perkel) >>> >> It doesn't match the host name in the HELO, doesn't match the domain name in >> the MAIL FROM:<>. >> > > I'm really reluctant to answer back for MP, but: So what? There is > nothing saying it has to be this way. The only guarantee for the HELO > host name is that it exists (which you can check) and belongs to the > client host (which you cannot check, for 'check' being anything better > than 'guess'). And if you look closely, the EHLO name resolves to just > the client's source IP address, which is not even necessary for > compliance, but should really be sufficient if you have such tests. > > >> BUT, from my perspective, as a "junkemailfilter", the DNS should be perfect >> > > I will not comment on this... > It's an interesting issue. I use several IP addresses and sometimes I have to switch IP addresses because I'm wringly blacklisted. So to do it right my HELO would need to change dynamically as the IP changes. Is there a way for the HELO to be the reverse lookup of the IP the request is being made on?
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