Sendmail error: MX List points back

Hi,
I am new in Linux (Red Hat v.6.1) and trying to setup Sendmail (v.8.9.3-15).

I have an MX DNS entry for my domain.
I added the line into /etc/sendmail.cf:
Cwlocalhost mail.mydomain.com

3. Started sendmail:

/usr/sbin/sendmail ?q5m

4. I have entries in /etc/mail/access:

localhost.localdomain RELAY

localhost RELAY

mydomain.com RELAY

mail.mydomain.com RELAY
client_PC_IP_address RELAY

sendmail_sever_IP_address RELAY

(maybe some entries are unnecessary, I put just in case)

5. I ran command:

makemap hash /etc/mail/access < /etc/mail/access I created e-mail account: ?alex? using Mail Monitor I can successfully send out e-mail but cannot receive it. I found the following errors in the log file: From , size=?????? MX LIST for mydomain.com points back to mail.mydomain.com: no such file or directory ?local configuration error.

What am I missing? Thank you,

Alex Suvorov
Sr. Systems Administrator
alex_suvorov@hotmail.com