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sounds like SurfControl is broken... Have them run
nslookup and see the results like this:
C:\Documents and
Settings\eshanbrom.IPSWITCH_M>nslookup
Default Server:
dexter.ipswitch_m.ipswitch.com
Address: 192.168.5.11
> set type=ptr
>
68.167.205.203
Server: dexter.ipswitch_m.ipswitch.com
Address:
192.168.5.11
Non-authoritative
answer:
203.205.167.68.in-addr.arpa name =
mail.rogersbenefit.com
205.167.68.in-addr.arpa nameserver =
ns3.covad.com
205.167.68.in-addr.arpa nameserver =
ns4.covad.com
ns3.covad.com internet address =
66.134.75.38
ns4.covad.com internet address =
66.134.75.39
Eric S
----- Original Message -----
Sent: Thursday, January 12, 2006 11:02
AM
Subject: [IMail Forum] Reverse DNS vs.
PTR Record
Is there a difference between reverse DNS records and PTR
records? I always thought they were the same thing. But some of
our users were having trouble sending to a specific domain and when I spoke to
the other company's techs, they said they were refusing our emails because we
have no PTR record.
But I knew we did have one. I told the
tech to go to dnsreport.com and look down in the MX area.
http://www.dnsreport.com/tools/dnsreport.ch?domain=rogersbenefit.com
Shown
here:
| PASS |
Reverse DNS entries for MX records |
OK. The IPs of all of your mail server(s) have reverse DNS (PTR)
entries. RFC1912
2.1 says you should have a reverse DNS for all your mail servers. It is
strongly urged that you have them, as many mailservers will not accept
mail from mailservers with no reverse DNS entry. Note that this
information is cached, so if you changed it recently, it will not
be reflected here (see the www.DNSstuff.com Reverse DNS Tool for
the current data). The reverse DNS entries are:
203.205.167.68.in-addr.arpa mail.rogersbenefit.com. [TTL=1470] |
But
he told me that they use SurfControl 5.0 SP3 and when he checks his log files
for these transactions where our domain was refused by theirs - SurfControl
came back and said "No PTR Record".
Does anyone know if
SurfControl looks up PTR records differently than dnsreport.com? Anyone
ever seen this?
Kevin --- [This E-mail was scanned for viruses.] To
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|
- Re: [IMail Forum] Reverse DNS vs. PTR Record Eric Shanbrom
-
