MX Issues

[phn at icke-reklam.ipsec.nu]

A T Thomaidis <grpprod at hotmail.com> wrote:
> I would like to ask what is the minimum declaration in DNS (the MX part)
> required for Sendmail to be able to work.

The minimum is none ( then sendmail will junt for 'A' records) 

Next to minimum is one MX :
your-domain.	IN	MX	10 <FQDN-of-mailservers>


> In general I find difficult to understand the concept of MX. Don't know why.
> Any good resources or explanations?

LHS denotes domain part of a mailaddress, RHS says which mailserver
that accepts mail for this mailaddress.

Big point is that the mailserver does not even need to be 
inside the domain, in fact it could be anywhere on Internet.

MX also gives a redundancy mechanism, so if the first mailseerver
is unreachable, mail will be delivered to the next one. Thus the
sender will be able to send the mail ( in contrast to queueing
it locally and retry at a later time)





-- 
Peter Håkanson         
        IPSec  Sverige      (At the Riverside of Gothenburg, home of Volvo)
           Sorry about my e-mail address, but i'm trying to keep spam out.
	   Remove "icke-reklam" and it works.