Accepting mail from all servers

[Spinkick]

Sendmail in FreeBSD 4.3 is configured to reject mail from any server that is not listed on the '/etc/mail/access 'file
by default. My question is, how can I set it so that it will accept mail from anywhere unless I specify not to in the access file.
Also, I would like the machine my web server is on to handle my mail as well. What would the name of the mail server be? What name do I enter in the MX record? Is there anywhere in the sendmail configuration files where I set it?
For example, mail.mydomain.com

 

[StarTAC]

the /etc/mail/access file defines hosts on your network or outside your network allowed to use your mail server to send their e-mail.. if u have a private LAN with say 2 computers, of the ip addresses 192.168.0.2 and 192.168.0.3, u would enter this in /etc/mail/access:

192.168.0.2 RELAY
192.168.0.3 RELAY
yourdomain.com RELAY

what this says is if these domains/ip's need to use SMTP, allow access and relay their messages... read the sendmail docs for other flags, such as REJECT and more...

whichever machine u elect to receive and send mail, all you have to do is assign it a name with an A record in the DNS server, and then make that name the MX record in the same zone/DNS server.. to illustrate:

web.yourdomain.com. IN A 1.2.3.4
yourdomain.com. IN MX web.yourdomain.com.

i think u see where am getting at...

good luck