[ic] Strange "Unable to send mail" error

DB interchange-users@icdevgroup.org
Thu Dec 19 12:14:01 2002


>> That sounds EXACTLY like the probem I had a few weeks back. The problem
>> in my case was with my DNS. The first machine listed in my
>> /ets/resolv.conf was down for service. That caused sendmail to timeout
>> before the DNS lookup could be performed for maybe 1 in 10 of my orders.
>> Like you, I had to get the order info from the catalog's error.log. No
>> errors showed up in /var/log/messages or /var/log/maillog.
>>
>> Try some command line experiments using nslookup or dig to test the
>> responsiveness of the first server listed in your /etc/resolv.conf, or
>> try a putting different server first in the list. I strongly suspect
>> your problem is related to DNS.
>>
> 
> So, i had a look to my resolv.cnf.
> It seems that people who make support of my server, only specify one DNS in
> the resolv.conf :(
> The problem could be here, so i'll ask to add at least one more dns.
> 
> I hope that this will correct this issue.
> 
> Thanks
> David

If that is the problem (which I suspect) then adding a second entry 
won't help. There will still be a timeout delay if the first is not 
working well. They'd have to replace the first entry. Have you tried 
command line tests with dig or nslookup?

DB