Title: Message
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Kevin,
This says that your
mail servers have reverse DNS, but doesn't say whether your users do. Every
public IP on your network needs to have a PTR if you want email originating from
that IP to be accepted.
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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