> I don't think the
> first name in an FQDN must be a domain name; I think it can
> also be a host. For example, www.ebay.com is a FQDN, but the
> www refers to a host. Similarly, in an internal LAN, you can
> refer to server.domainname, and that is a FQDN. So
> mail.salemradiology.com could refer to a subdomain or to a
> record in the domain (such as an MX record). Unless I give
> you context, you have no way of telling which.
You are correct that in that is can also be a host. But as to SMTP and mail
delivery what comes after the @ is considered to be a domain name. If you
want to deliver to a host then you should use an ip address after the @
[EMAIL PROTECTED]
I think yo are not fully understanding how DNS and SMTP interact. Most
people are used to anyting in front of the second . Seperator being a host.
After the second . Seperator it can be a domain.
There can be many many subdomains stacked on top of each other for instance
Subdomain4.subdomain3.subdomain2.subdomain1.example.com and hosts can
be at all levels.
I suggest leaving this alone for a few days an reread this thread.
Kevin Bilbee
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