[ic] Strange "Unable to send mail" error

[interchange-users@icdevgroup.org (David Bordas)]

> 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