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Client host rejected: rDNS/DNS validation failed. Please setup matching DNS and rDNS

Discussion in 'E-mail Discussions' started by majoosh, Jul 28, 2007.

  1. majoosh

    majoosh Well-Known Member

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    Hi,

    Am having a problem sending mails to craigslist.org. It is giving error like :
    --------
    host mxi4s.craigslist.org [66.150.243.11]: 554 <unknown[<myIPaddress>]>:
    Client host rejected: rDNS/DNS validation failed. Please setup matching DNS and rDNS records:
    --------
    For my server all the domains have dedicated IP address and exim's outgoing interface is configured on one IP address.

    I set up reversedns/PTR for the domains IP as the domain name, but for exim's outgoing interface IP I will not be able to give rDNS as that domain name because other domains in the server is using the same outgoing interface.

    I know it can be fixed by setting up rDNS for outgoing interface IP as the domain name but I want to know if there is any other workaround ???? I will really appreciate if anybody can help me


    Thanks
    Majoosh
     
  2. jandafields

    jandafields Well-Known Member

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    No, there is no workaround. If your mailserver IP does not have rDNS, your email will be rejected by pretty much everybody. All shared IP's have a rDNS, all dial-up IP's have rDNS, this is not a problem. Just use something generic if you want, as long as it is actually valid and it points back to your machine itself. It by no means has to be one of your customers domain names, just get something even as generic as mailserver.outgoingmail.com, and point it to your server, make it your server hostname, and rDNS to it.
     
    #2 jandafields, Jul 28, 2007
    Last edited: Jul 28, 2007
  3. majoosh

    majoosh Well-Known Member

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    My mail server have rDns setup and is workng for all other domains except for craigslist.org and I got the results of host <my mail server utgoing Ip address> and it's my hostname too...

    Thanks
    Majoosh
     
  4. jandafields

    jandafields Well-Known Member

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    You specifically said it did not have rdns:

    Also, make sure every domain has that IP in its SPF records, very important!
     
  5. majoosh

    majoosh Well-Known Member

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    Fixed :)

    And this is how .... I did ;)

    changed the outgoing interface IP to main shared IP ....


    Thanks
    Majoosh
     
  6. liyakuriakose

    liyakuriakose Registered

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    same issue...... got fixed .....thanks :)
     
  7. partsace

    partsace Active Member

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    Ok can someone explain what he did? I do not know what the "outgoing interface IP" is. I have tried everything. Added a new hostname of mailhost.mydomain.net and when I send myself an email to a yahoo.com account I get this:

    I am starting to not like craigslist.org!

    Thanks,

    Scott
     
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