[CLUE-Tech] how to troubleshoot smtp server

[Jeffrey Greer]

Hi,

I'm new to this list.  I plan to attend my first CLUE meeting next week and I 
would like to get involved.

I've been using linux for 4 years, but I have not done much real system 
administration.  I am having a problem setting up email on a dedicated linux 
server I just purchased.  The remote machine is buddha.whitebuddha.com.  When 
I send email from a remote machine via smtp it just gets lost.  Sendmail is 
running at buddha and I can send email locally with pine, but nothing comes 
in remotely.  I can't find anything in /var/log/maillog.  I'm running redhat 
7.2.  I've configured the nameserver at www.dnsmadeeasy.com.  Dnsmadeeasy.com 
automatically edits the soa file through a web form.  I've set up the MX 
record to point to whitebuddha.com.

I don't really have any idea how to troubleshoot this or what docs to look 
at.  Could someone here give me some suggestions?

Thanks

Here is part of an email that was returned to me:
------------------------------------------------------------------------------
From: MAILER-DAEMON at yahoo.com
To: jeffrey_g28 at yahoo.com
Subject: failure delivery
Status: R 
X-Status: N
 
Message from  yahoo.com.
Unable to deliver message to the following address(es).

<jgreer at whitebuddha.com>:
Sorry, I wasn't able to establish an SMTP connection. (#4.4.1)
I'm not going to try again; this message has been in the queue too long.
------------------------------------------------------------------------------

Also, apache works fine.  I can see the default apache page at 
www.whitebuddha.com.
-- 
Jeffrey Greer