[Info-vax] Decuserve.org - Anyone know why it's down?

[VAXman- at SendSpamHere.ORG]

In article <ch26r1FmebaU4 at mid.individual.net>, bill at server3.cs.scranton.edu (Bill Gunshannon) writes:
>In article <00AF0CC5.B67E7944 at sendspamhere.org>,
>	VAXman-  @SendSpamHere.ORG writes:
>> In article <ch07s0F7i9pU3 at mid.individual.net>, bill at server3.cs.scranton.edu (Bill Gunshannon) writes:
>>>In article <00AF0C71.35A9A1A4 at sendspamhere.org>,
>>>	VAXman-  @SendSpamHere.ORG writes:
>>>> In article <ch01i5F5rgqU1 at mid.individual.net>, bill at server3.cs.scranton.edu (Bill Gunshannon) writes:
>>>>>In article <00AF0C69.FA2DB1D5 at sendspamhere.org>,
>>>>>	VAXman-  @SendSpamHere.ORG writes:
>>>>>> In article <cgvsc6F3j6iU5 at mid.individual.net>, bill at server3.cs.scranton.edu (Bill Gunshannon) writes:
>>>>>>>In article <m8a72d$sl0$1 at dont-email.me>,
>>>>>>>	Stephen Hoffman <seaohveh at hoffmanlabs.invalid> writes:
>>>>>>>> On 2015-01-04 01:17:20 +0000, Simon Clubley said:
>>>>>>>> 
>>>>>>>>> On 2015-01-03, Stephen Hoffman <seaohveh at hoffmanlabs.invalid> wrote:
>>>>>>>>>> 
>>>>>>>>>> FWIW, the decuserve.org DNS resolution has been re-targeted.  The 
>>>>>>>>>> domain is now resolving to a different, Boston-area IP address.
>>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> What IP address are you seeing and what do you think the last IP address was ?
>>>>>>>> 
>>>>>>>> I reversed it back to an IP address that indicated it was a Verizon 
>>>>>>>> FiOS static, which AFAIK / AFAICR is new.   IIRC, the old address 
>>>>>>>> didn't reverse back to FiOS.  If not, "nevermind".
>>>>>>> 
>>>>>>>I hope that's going to change as it will definitely affect who the users
>>>>>>>can send email to.
>>>>>> 
>>>>>> Why do you say that?
>>>>> 
>>>>>Many (one would hope most, if not all) proper MTA's will look at the entry
>>>>>in the HELO (or EHLO) command in SMTP and attempt to match it to the DNS PTR
>>>>>value.  If they don't match it is assumed the contacting MTA is spoofing
>>>>>and will be rejected.
>>>> 
>>>> Again, why?  If FioS provides a static IP, then there should also be some
>>>> way to provide DNS lookups for that static IP.  What good would static IP
>>>> be without it??? 
>>>> 
>>>
>>>Sigh....
>>>
>>>
>>>server1# nslookup
>>>
>>>> set q=A
>>>
>>>> decuserve.org
>>>
>>>Non-authoritative answer:
>>>Name:   decuserve.org
>>>Address: 96.252.127.67
>>>
>>>
>>>
>>>> set q=PTR
>>>
>>>> 67.127.252.96.in-addr.arpa.
>>>
>>>Non-authoritative answer:
>>>67.127.252.96.in-addr.arpa      name = static-96-252-127-67.bstnma.fios.verizon.net.
>>>
>>>Authoritative answers can be found from:
>>>127.252.96.in-addr.arpa nameserver = ns7.verizon.net.
>>>127.252.96.in-addr.arpa nameserver = ns5.verizon.net.
>>>127.252.96.in-addr.arpa nameserver = ns8.verizon.net.
>>>127.252.96.in-addr.arpa nameserver = ns6.verizon.net.
>>>
>>>
>>>The A record is looked up based on the name which is registered to
>>>Connect Worldwide, Inc. and so their nameserver is used.
>>>
>>>But the PTR record is looked up using the numeric IP address and that
>>>points to servers run by Verizon Online LLC.
>>>
>>>This is the same problem run into by people using things like dyndns.
>>>
>>>Here's one (sanatized) taken directly from my servers maillog.
>>>
>>>Jan  5 00:05:22 mailhost postfix/smtpd[49341]: NOQUEUE: 
>>>reject: RCPT from 67.107.123.196.ptr.us.xo.net[67.107.123.196]: 
>>>450 4.7.1 <mia-p-mail-01.int.ppcit.net>:
>>>Helo command rejected: Host not found; from=<xxxxxxx at pagepluscellular.com>
>>>to=<xxxxxx at cs.uofs.edu> proto=SMTP helo=<mia-p-mail-01.int.ppcit.net>
>>>
>>>Note that while the "helo" matches the name presented by the sending
>>>MTA (line 3) it does not match the PTR Record (line 2) and the email
>>>is rejected.
>>>
>>>It ain't rocket science but running a proper email server is harder
>>>than most people seem to think.  And if more of them were run properly
>>>SPAM would rapidly disappear.
>> 
>> That's failure to setup the reverse lookup; not a problem with static IP.
> 
>No kidding.  And that is what one sees with decuserve.org.  And, at
>least for email, it makes the static IP useless.

Perhaps, for mail; however, DECUServer is much more than a mail service.

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