LinuxQuestions.org

LinuxQuestions.org (/questions/)
-   Linux - Newbie (https://www.linuxquestions.org/questions/linux-newbie-8/)
-   -   Sendmail - Mailq Errors (https://www.linuxquestions.org/questions/linux-newbie-8/sendmail-mailq-errors-789863/)

tech_paul 02-18-2010 12:59 AM

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.

TB0ne 02-18-2010 08:34 PM

Quote:

Originally Posted by tech_paul (Post 3867718)
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.

deadeyes 02-19-2010 06:23 AM

Quote:

Originally Posted by TB0ne (Post 3868833)
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).

tech_paul 02-20-2010 02:15 AM

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

aolujumu 02-20-2010 02:20 AM

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

TB0ne 02-20-2010 10:49 AM

Quote:

Originally Posted by aolujumu (Post 3870137)
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.

tech_paul 02-21-2010 06:56 AM

Any updates on my thread please?

TB0ne 02-21-2010 10:27 AM

Quote:

Originally Posted by tech_paul (Post 3871324)
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


All times are GMT -5. The time now is 02:30 PM.