Solved

reverse DNS

Posted on 2004-10-27
227 Views
Last Modified: 2013-12-06
HERE IT GOES
i can no longer send mail to AOL they told me that i do not have reverse dns setup
and will not be able to sent mail to them untill i set it up
here is where im confused
when mail goes out of my network aol is picking up my firewalls ip adress  not my mail server
so do i set up a pointer and a A record to my firewall for reverse dns since this is what they seeing on their end
i allready have an a record and an mx record setup for my mail server
ex.. A record......mail1.helpme.com  200.100.50.10
    MX record......mail1.helpme.com  200.100.50.10
do i setup this?
    A record......mail1.helpme.com  200.100.50.1 (FIREWALL)
   POINTER  .....mail1.helpme.com  200.100.50.1 (FIREWALL
can you have 2 A records with the same name that point to different ip addresses as the example above
0
Question by:dano992
    4 Comments
     
    LVL 95

    Accepted Solution

    by:
    You can have two A records with the same name, but you should know in reverse lookups, only the first entry will ever be provided.
    0
     
    LVL 1

    Assisted Solution

    by:alexai
    Adding more A records, pointing to your firewall will only confuse all mail servers, for I'm sure your firewall does not handle mail.

    You need to create (if you haven't yet) a reverse lookup zone, in your DNS server:

    10.100.in-addr.arpa

    and populate it with the rest of the IP address as subdomains (50 and 200) and then add there your MX's FQDN.

    or a single zone:

    10.100.50.200.in-addr.arpa

    it's up to you and how many public IP addresses you have

    Windows doest it automatically for you. If you're on *NIX you have to edit the files by hand, unless there is a GUI, like SAM in HP-UX.
    0
     
    LVL 11

    Assisted Solution

    by:PennGwyn
    > 10.100.50.200.in-addr.arpa

    Note that this zone entry will only ever be FOUND if the ISP responsible for 200.50.100.* both

    (a) Implements a 100.50.200.in-addr.arpa zone, and

    (b) Delegates the 10.100.50.200.in-addr.arpa zone to your DNS server.

    For a single host, (b) represents more work than most ISPs want to do, and it's simpler for THEM to resolve the "hostname" 10 within their Reverse DNS zone for you.  Neither approach is something you can achieve without them.

    (<RANT ON>AOL's *bogus* assumption is that ISPs always provide reverse DNS for their static customers, and never for their DHCP customers (who shouldn't be running mail servers on those links).  Not only are a lot of people in your situation, there are plenty of cable/DSL ISPs who provide useless Reverse DNS entries for their entire address space, just so idiots like AOL can't screw things up for their customers even if they are running compromised spambots. </RANT OFF>)



    0
     
    LVL 25

    Assisted Solution

    by:mikeleebrla
    FYI you also have SPF records in order to send mail to aol now: see below:

    http://postmaster.aol.com/spf/

    THis page will actually walk to through and set up the spf record for you:

    http://spf.pobox.com/wizard.html

    Hope this helps

    0

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone. Privacy Policy Terms of Use

    Featured Post

    How your wiki can always stay up-to-date

    Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
    - Increase transparency
    - Onboard new hires faster
    - Access from mobile/offline

    Suggested Solutions

    About FreeBSD Jails In FreeBSD, jails are a way of doing operating system level virtualization.  The basis of FreeBSD jails is chroot (https://www.freebsd.org/cgi/man.cgi?query=chroot&sektion=2), which changes the root directory of processes.  As a…
    Data center, now-a-days, is referred as the home of all the advanced technologies. In-fact, most of the businesses are now establishing their entire organizational structure around the IT capabilities.
    Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
    After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

    875 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    8 Experts available now in Live!

    Get 1:1 Help Now