[Simh] Proper IPV4 addresses for emails to from the list ?

[Johnny Billquist]

Uh... The forward and reverse do match, as far as you can ever expect 
them to match. It is quite common that machines are on networks where 
the reverse lookup gives a different address, because of the way reverse 
lookups work. So the "proper" thing is to start with a reverse lookup, 
and then do a forward lookup on that result, which should then match, 
and it do for that address.

Now, as far as where mails come from, that can be tricky. Mails can pass 
through other MTAs on the way, depending on whatnot, so you cannot 
guarantee that it comes from a specific address. Even though it usually do.

And yes, trailing-edge.com is the machine originating the mails from the 
list (at least for now).

I would say that it's usually not sensible to try and use iptables or 
similar filtering for smtp. Unless you essentially are ok with your mail 
setup being somewhat broken.

   Johnny

On 2019-04-25 00:42, James W. Laferriere wrote:
>      Hello Whomever ,  I am looking for a list (if necessary) for the 
> proper host that sends & receives emails for the simh (and any other 
> lists) .
>      I have harvested 71.191.185.32 from the headers of the emails I 
> have received .
> 
>      Now this gives me doing a dig (ie: in-addr.arpa. lookup) ...
> 
> jiml at bigscrn-vm:~$ dig -x 71.191.185.32 +short
> static-71-191-185-32.washdc.fios.verizon.net.
> 
>      And as you can see the Inverse & Forward do not match .
> 
>      I also find ... from the headers ...
> 
> jiml at bigscrn-vm:~$ dig mini-me.trailing-edge.com +short
> 71.191.185.32
> 
>      Which leads me to believe that my harvesting is correct .
>      Please someone in the know correct my doubts .
> 
>      I am in the process of creating a iptables accept/reject list the 
> assurance would help a bunch .
> 
>          Tia , JimL

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol