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Domain resolution

jdunlop
jdunlop asked
on
Medium Priority
195 Views
Last Modified: 2010-03-17
I can't figure out how part of name resolution
works when logging onto POP3. Currently, if I don't
put an entry in named.hosts called "mydomain.com."
(with the period at the end) that resolves to my
mail server's IP address, I can't log onto POP3 as
user@mydomain.com. But at the same time it seems
odd that mydomain.com must resolve strictly to the
mail server. And, in examples showing how to set up
a named database, I've never seen a hosts entry
with just the domain name.

Is this domain resolution a function of DNS, or do
I have something else screwed up?
Comment
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Commented:
Nope, nothing screwed up. You nailed it.

That is why the convention is to use mail.yourdomain.com
(or smtp.yourdomain.com, whatever) to allow you the freedom
to just use a CNAME for mail, and move it wherever you want.

Perhaps Bind 8 won't have this restriction.  Whats funny is
the MX records will allow mail to come in without that entry
in named.hosts, but won't allow POP clients to check it.

Regards,

CB

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