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Old 02-18-2010, 12:59 AM   #1
tech_paul
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Registered: Apr 2009
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Sendmail - Mailq Errors


Hi,

I have sendmail configured on a CentOS linux machine using scalix and I am finding alot of the following error messages in the mailq:

-> Deferred: ntvirus3.mitts.net.: No route to host
-> Transient parse error -- message queued for future delivery
-> Deferred: Connection timed out with peakings.com.

Can someone please explain to me what these errors mean? And how can I resolve them (if any)?

Thanks in anticipation for your help.
 
Old 02-18-2010, 08:34 PM   #2
TB0ne
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Location: Birmingham, Alabama
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Quote:
Originally Posted by tech_paul View Post
Hi,

I have sendmail configured on a CentOS linux machine using scalix and I am finding alot of the following error messages in the mailq:

-> Deferred: ntvirus3.mitts.net.: No route to host
-> Transient parse error -- message queued for future delivery
-> Deferred: Connection timed out with peakings.com.

Can someone please explain to me what these errors mean? And how can I resolve them (if any)?

Thanks in anticipation for your help.
Sendmail is trying to do a DNS lookup on the recipients domain. I know that often the internal networks don't have access to the external DNS, and you have to disable DNS lookups.

Of course, that all depends on how your network, DMZ, firewalls, etc., are set up, but that error points to a DNS lookup failure.
 
Old 02-19-2010, 06:23 AM   #3
deadeyes
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Quote:
Originally Posted by TB0ne View Post
Sendmail is trying to do a DNS lookup on the recipients domain. I know that often the internal networks don't have access to the external DNS, and you have to disable DNS lookups.

Of course, that all depends on how your network, DMZ, firewalls, etc., are set up, but that error points to a DNS lookup failure.
You can disable the lookups but be aware that you are not creating an open smtp (which can be used for spam).
 
Old 02-20-2010, 02:15 AM   #4
tech_paul
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Registered: Apr 2009
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I have added the Domain pointing to the IP in the /etc/hosts because it was not resolving in the DNS server of my ISP. This is not the best solution because if the domain changes its IP address I will have problems again.

What can I do to resolve this please? Is there another better solution please?

Thanks
 
Old 02-20-2010, 02:20 AM   #5
aolujumu
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Registered: Feb 2010
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I am still new to Linux operating system
I did it a little in college, and am still yet to
see its advantage over your conventional windows
 
Old 02-20-2010, 10:49 AM   #6
TB0ne
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Location: Birmingham, Alabama
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Quote:
Originally Posted by aolujumu View Post
I am still new to Linux operating system
I did it a little in college, and am still yet to
see its advantage over your conventional windows
Ok, what's your point?? Have a question somewhere?

Don't hijack someone elses thread...if you want to post, open your
own thread. And if you like Windows better, use it. You won't hurt our feelings.
 
Old 02-21-2010, 06:56 AM   #7
tech_paul
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Any updates on my thread please?
 
Old 02-21-2010, 10:27 AM   #8
TB0ne
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Quote:
Originally Posted by tech_paul View Post
Any updates on my thread please?
It's been 24 hours since you last posted, saying you found a temporary solution. Your original question was answered.

You were put on the right track, even though the original error was easily found on Google. Since you know it's DNS related, have you tried to investigate how to get Sendmail working with DNS further upstream?

http://www.sendmail.org/tips/private..._highlight/dns
 
  


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