Re: [Exim] RFC: Fighting Spam due to forgeries of outblaze …

> > > Not if you also check that the PTR name looks up to the same IP.
> > Last time I looked, Exim will only set the hostname if the rdns name
> > resolves back to the same IP.
> >
> --
> Exim 2.4x (and 2.3x i believe) will set the $sender_host_name upon lookup
> of PTR records to what the DNS resolver PTR returns for $sender_host_address.
> This is not the same as asking exim if helo/ehlo is verified.
> --EAL--

I said nothing about helo/ehlo. Isn't exim 2.x a bit old? I know sometime
in 4.x that asking for $sender_hostname caused it to do rDNS, but I believe
it also does a dns lookup for the name that is retrieved from rDNS before
setting this.

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