topic Re: stoping sendmail from checking domains before relaying in Operating System - Linux

stoping sendmail from checking domains before relaying

Wessam Aly — Tue, 02 Nov 2010 09:27:05 GMT

Hi,

In my company we have an exchange box for handling emails inside and outside of the company. I have setup a linux relay box running postfix which should accept mail from any *nix host running in our company and relay it to any users on the exchange (address user@company.com)
my relay is relay.company.corp

i'm trying to configure a redhat (5.3) server running sendmail 13.8 to send mail through the relay. any mail originating from the redhat server addressed to user@company.com should get relayed to relay.company.com and hence sent through the exchange server.

I always get the following error
company.com: Name server timeout

DS has been setup to relay.company.corp and we dont use dns. nsswitch.conf is set to files

why does sendmail try to resolve company.com ?? all i want it to do is send the mail to relay.company.corp regardless of who it is addressed to.

any ideas ?

Re: stoping sendmail from checking domains before relaying

Wessam Aly — Tue, 02 Nov 2010 09:29:17 GMT

by the way

relay.company.corp already sends mail properly to any user on the exchange server.

Re: stoping sendmail from checking domains before relaying

VK2COT — Sun, 07 Nov 2010 21:20:16 GMT

Hello,

Several possible scenarios. It all depends on
which one you like:

a) Use mailertable:

# vi /etc/mail/mailertable

company.com esmtp:[relay.company.corp]

Make sure that relay.company.corp is
listed in /etc/hosts.

After editing /etc/mail/mailertable,
create the DB file in that directory.

b) Check some web suggestions:

http://www.sendmail.org/faq/section3#3.22

http://www.phase2.net/2007/03/20/sendmail-on-rhel-40-without-dns/

Cheers,

VK2COT