Mail from 216.48.xxx.xxx rejected due to missing or invalid RDNS

Discussion in 'Windows Small Business Server' started by Kevin, Feb 4, 2005.

  1. Kevin

    Kevin Guest

    Can someone please help me, thnak you.
    I checked my DNS server settings and do not have a reverse DNS set up.
    How to do this and why I am doing this?

    Your message did not reach some or all of the intended recipients.

    Subject: PARTY!!!
    Sent: 2/2/2005 12:37 PM

    The following recipient(s) could not be reached:

    Dave Reed () on 2/2/2005 12:37 PM
    You do not have permission to send to this recipient. For
    assistance, contact your system administrator.
    <AirExcell.com #5.7.1 smtp;550 5.7.1 <>... Mail
    from 216.48.0.139 rejected due to missing or invalid RDNS - Contact your
    network administrator/ISP - ONLY if you are an admin of a system whose mail
    is being rejected should you contact to arrange for TEMPORARY
    whitelisting>
     
    Kevin, Feb 4, 2005
    #1
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  2. Hi Kevin,

    Like it says, contact your ISP (or whomever hosts your domain records) and
    have them create a RDNS record.

    It's a somewhat common practice for a receiving mail server to try and
    contact your mail server via reverse lookup, prior to accepting email. This
    is done to ensure that the email was sent from where it says it was sent
    from, as it's common for spammers to spoof an identity. (saying they are
    so_and_so at a give IP, when they're not).

    go to http://www.dnsreport.com, enter your domain name (domain.com) and run
    the DNS report for more information.
     
    Les Connor [SBS Community Member - SBS MVP], Feb 4, 2005
    #2
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