Hi,
I'm wondering about some messages with Received headers such as this:
Received: from zaphod.chipchaps.com (unknown [65.182.186.13])
It says 'unknown', but 65.182.186.13 does resolve, to chipchaps.com (a
spam site), which resolves back to 65.182.186.12. Is this where the
problem is?
I'm not sure if I'm having a DNS problem with my resolver not being
able to find the answer in time (or at all), or I'm possibly not
understanding how to do this properly. I'd like to determine if I can
add additional restrictions in postfix to limit connections from hosts
that don't resolve properly, but before I can do that I need to make
sure my DNS is working properly. Maybe I'm able to resolve it now but
wasn't able to when the email arrived? Maybe the DNS info has changed
since the email was received?
What are the risks or implications of denying messages of this type?
Thanks,
Alex
