0
votes
0answers
14 views

config rdns for mail server or web server [closed]

this is my servers structure : mysite.com run on 1.1.1.1 mail.mysite.com on 1.1.1.2 (i use MDaemon Messaging Server) set some-one@mysite.com for from header server for handling queue and ...
0
votes
1answer
39 views

What domain to set in rDNS

I have a few different domains on a shared IP address. One of them is having trouble sending email, as certain mail servers reject the email for not having rDNS set up properly. The thing is there ...
0
votes
2answers
401 views

Postfix: bouncing mail (reverse DNS issue)

I have a problem with Postfix. I get this with some email address: to=<mail@domain.tld>, relay=mail.domain.tld[IP_ADDRESS]:25, delay=3, delays=0/0/2.5/0.52, dsn=5.7.1, status=bounced (host ...
0
votes
1answer
156 views

How to set up reverse DNS on Ubuntu 12.04 VPS

As far as I can remember when setting up my VPS and mail server on it, I had configured the mail server correctly. However, a few of my clients get SMTP errors, host mx1.zonnet.nl[62.58.50.9] ...
0
votes
1answer
77 views

Reverse dns and SaaS Spam Filters

We have an exchange server in the office that for a year or so has just used the built-in spam filters - we have added the SpamHaus IP addresses so that some basic spam filtering is done. However, ...
0
votes
0answers
320 views

The HELO/EHLO string doesn't match to one of the names in the rDNS from connecting IP

I have a website that uses Postfix to send out emails. It turns out the IP address for my site has been blacklisted, and testing here: http://multirbl.valli.org/, by sending out an email results in ...
0
votes
1answer
47 views

Mailserver DNS and rDNS setting

Let me start with the fact that things are quite weird in our organization. Now, we have to place a mailserver for a DNS zone that is under our control, for example xxx.yyy.zzz. However, we can't ...
1
vote
2answers
160 views

How Reverse DNS does what it does

Hopefully this is not a stupid question, but I cannot find a clear cut answer. Can someone please inform me exactly what 'source address' is used in Reverse DNS? Does rDNS pull the IP address from ...
2
votes
2answers
722 views

What is the correct mail set up for multiple domains on one server?

I have a machine (centos 5) with one external ip address. On that machine I have many virtual hosts with a few different top level domain names and sub-domains under those eg. sub1.domain1.com ...
0
votes
1answer
255 views

want to Request our ISp to do rdns/ ptr modify for my Staic IP ot point to my Domain?

we setup a mail server in our local office using Mdaemon Mail Server . We have a Staic ip 123.xxx.123.xxx ( as an example ) and all necessary ports (80 , 25 , 110 ) are made open . We have a ...
3
votes
2answers
346 views

Postfix & client IP reverse DNS

I explicitly added reject_unknown_client_hostname and several other reject rules to slow down SPAM in our server. So far that's working nicely. However, there is an important client that keeps ...
0
votes
2answers
970 views

Email rejected for no rDNS by AOL despite having rDNS [duplicate]

I am having trouble while attempting to send a single email to an aol.com user. I get a rejection reply as follows: Your message did not reach some or all of the intended recipients. Sent: Wed, ...
1
vote
2answers
228 views

Is it ok that reverse DNS for my mail server resolves to www2.domain.com and not domain.com?

I am trying to make sure my mail server is set up correctly. One of the steps is to ensure that reverse DNS works. We email from ...@domain.com. When I test rDNS using nslookup i get: $ nslookup ...
2
votes
2answers
2k views

PTR record (rDNS) for multiple domains on a shared IP address

I host multiple domains on a single IP address: cats.com A @ --> 10.20.30.40 A mail --> 10.20.30.40 MX @ --> mail dogs.com A @ --> 10.20.30.40 A mail --> 10.20.30.40 MX @ --> ...
0
votes
1answer
163 views

Does RDNS for mail server have to match the mail server hostname exactly?

Typically when setting up a mail server, I create an rDNS record for the mail server IP to match the mail server hostname (ex: mail.example.com). Can I instead set the rDNS ptr to match the parent ...
1
vote
1answer
3k views

DNS Server Configuration problem , PTR records

Hi I have a server that using Windows server 2003 , and Microsoft DNS Server. I have a problem on my DNS setting ERROR: No reverse DNS (PTR) entries. The problem MX records are: ...