[vPostMaster] Name or service not known

[John Holahan]

Hello.  I have looked in the archives and can not find much on this topic.  I have had vPostMaster running for a year or two and have used it mainly for sending mail for another (work) email address due to trouble with the work server having trouble when I send attachments.  Since getting it up and running, I really have had no issues and no complaints.  

However, we want to start using the domain that vPostmaster is hosting more extensively and just today ran into a problem. We got about 10 of these today when sending to various domains (i modified the actual domain names and email addresses to protect the innocent):

This is the vPostMaster program at host mail.holaxxxxly.com.

I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

            The vPostMaster program

<dwxxxy at ufl.edu>: [ufl.edu]: Name or service not known

In the attachment to this response is this:

Reporting-MTA: dns; mail.holaxxxxly.com
X-vPostMaster-Queue-ID: 5BDF920819
X-vPostMaster-Sender: rfc822; saxxxh at holaxxxxly.com
Arrival-Date: Wed, 12 Sep 2007 13:16:04 -0500 (CDT)
Content-Type: text/plain

Final-Recipient: rfc822; dwxxxy at ufl.edu
Action: failed
Status: 5.0.0
Diagnostic-Code: X-vPostMaster; [ufl.edu]: Name or service not known


From what I can understand, it seems to be a lookup problem with looking up the DNS record of the recipients...but I am quite a newbie to this stuff and need some help figuring out what to do.  I have been think that I need to change some settings...but am not too sure where to start.  My best thought so far is to see if /etc/postfix/main.cf  exists and, if so, to set disable_dns_lookups = no.  But I am not even sure that would help.

Any advice, written as simply and in plain English as possible would be appreciated.

John.





       
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