On Tue, 15 Jun 1999, Harald Hanche-Olsen wrote:
> + Dave Sill <[EMAIL PROTECTED]>:
>
> | That's good so far, but there's another step. You need an MX record
> | pointing JAMMConsulting.com to neil86.august.net. It looks like mail
> | to JAMMConsulting.com goes to mail.JAMMConsulting.com, which is an
> | alias for neil86.august.net.
>
> What's wrong with that setup?
>
> - Harald
>
MX records are supposed to point to A record host names. CNAMES are NOT
supposed to be the target of an MX record. See chapters 5 and 15 of the
O'Reilly "DNS and Bind" by Albitz and Liu.
This is valid:
mayod.nb.net. IN MX 10 plutonium.mayod.nb.net.
plutonium.mayod.nb.net. IN A 209.161.64.93
This is NOT valid:
mayod.nb.net. IN MX 10 mail.mayod.nb.net.
mail.mayod.nb.net. IN CNAME plutonium.mayod.nb.net.
plutonium.mayod.nb.net. IN A 209.161.64.93
It is also NOT valid to have a CNAME and an MX or A record for the same
name. The only record that will be used in that case is the CNAME.
The book by Albitz and Liu covers the why's and why not's of DNS setup
very well. I HIGHLY recommend getting yourself a copy and reading it if
you haven't already done that.
---------------------------------
Timothy L. Mayo mailto:[EMAIL PROTECTED]
Senior Systems Administrator
localconnect(sm)
http://www.localconnect.net/
The National Business Network Inc. http://www.nb.net/
One Monroeville Center, Suite 850
Monroeville, PA 15146
(412) 810-8888 Phone
(412) 810-8886 Fax
