Re: NDR 550 5.1.1 from valid email addresses

Tech-Archive recommends: Fix windows errors by optimizing your registry

Absolutely have these fixed
DNS should be as clean as possible to make sure stuff can find you when you want it too

--
Cris Hanna [SBS-MVP]
--------------------------------------
Please do not respond directly to me, but only post in the newsgroup so all can take advantage
"pcgnow" <pcgnow@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:DB011CCF-B130-4D2D-A016-B3AA26BF5981@xxxxxxxxxxxxxxxx
Using dnsreport looks like we have a second MX record that was added with the
same cost. I've asked my DNS provider to fix this. Not sure who authorized
the change but it wasn't me!!

I'm also seeing those errors you mentioned...
Fail: Open DNS servers
Fail: All nameservers respond
Fail: Missing (stealth)
Fail: Stealth NS record leakage

Are these errors I should be concerned about and ask my DNS provider to fix?

Thanks for your help!

"Cris Hanna (SBS-MVP)" wrote:

> if osiriscomm.com is your domain name...then you should really check out www.dnsreport.com
> It reports some errors with your public dns listing that could be causing problems
>
> --
> Cris Hanna [SBS-MVP]
> --------------------------------------
> Please do not respond directly to me, but only post in the newsgroup so all can take advantage
> "pcgnow" <pcgnow@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:09CDEF36-250B-4A4A-9151-344DB51C528D@xxxxxxxxxxxxxxxx
> Some of our customers are receiving NDR 550 5.1.1 errors. Example below.
> These are valid email address aliases listed under the user properties in AD.
> Some of our users have multiple email addresses and some only have one.
> Doesn't seem to matter. This started happening about 3 weeks ago. I have also
> posted the output from zoneedit.com below...
>
> Customer NDR from Outlook...
>
> The following recipient(s) could not be reached:
>
> 'valid_email@xxxxxxxxxxxx' on 3/26/2006 10:49 AM
> The e-mail account does not exist at the organization this
> message was sent to. Check the e-mail address, or contact the recipient
> directly to find out the correct address.
> <ouside_comanyserver.customer.local #5.1.1 smtp;550 5.1.1
> <valid_email@xxxxxxxxxxxx>... User unknown>
>
>
>
> zoneedit.com test ...
>
> OK, connected to mailserver.mydomain.com...
> < 220 cp101sj.osiriscomm.com ESMTP Sendmail 8.12.11.20060308/8.12.11; Sun,
> 26 Mar 2006 10:58:21 -0800
> > HELO edit.dnsvr.com
> < 250 cp101sj.osiriscomm.com Hello [69.72.176.182], pleased to meet you
> > MAIL FROM:<outside@xxxxxxxxxxxx>
> < 250 2.1.0 <outside@xxxxxxxxxxxx>... Sender ok
> > RCPT TO:<valid_email@xxxxxxxxxxxx>
> < 550 5.1.1 <valid_email@xxxxxxxxxxxx>... User unknown
>
>
>

Relevant Pages

  • Re: Rename 2K3 Domain - DNS Issues
    ... FAIL or WARN messages. ... cannot register for THEMSELVES if you change that -- if they are ... Name" tab, the domain name is listed, and it is the "DNS Suffix for this ... The new zone is set up to allow secure dynamic updates only; ...
    (microsoft.public.windows.server.active_directory)
  • Re: Exchange mailing to A records intermittently instead of MX records ???
    ... That would be consistent with lookup failures. ... If you fail that time, then you fail back to the application ... it would check DNS ...
    (microsoft.public.exchange.connectivity)
  • Re: OT: DNS Records
    ... > Andy Jacobs wrote: ... > DNS always works in this kind of way. ... >> the popbox on the backup server and the client can't pick it up until ... > One way to fail over would be to have a shortish TTL on the www record ...
    (uk.net.web.authoring)
  • Re: DNS resolution not working
    ... Also noticed that these computers that fail to lookup, ... So 4 computers fail to look up a dns record for one specific server, ... DNS is working, as nslookup works from the affected pcs. ...
    (microsoft.public.windowsxp.network_web)
  • Re: Windows 2000 file/AD problem - urgent
    ... effect where other services dependent on it subsequently fail as well. ... > This is my File/Print server and Domain Controller with DNS. ...
    (microsoft.public.win2000.general)