domain name resolution

Right now I have a domain crystalbox.org with an MX record which points to
crystalbox.no-ip.org. This is one of those free dynamic hostnames. However I've
noticed that when people try to send me mail at crystalbox.org, some messages
get the domain switched to crystalbox.no-ip.org, example sendmail logs follow.

Correct:
May 5 10:44:34 crystalbox sm-mta[4548]: k45FiXn4004548:
from=, size=1599, class=0, nrcpts=1,
msgid=<200605051644.22739.catwheezel@operamail.com>, proto=SMTP, daemon=MTA,
relay=pop5-1.us4.outblaze.com [205.158.62.125]
May 5 10:44:34 crystalbox sm-mta[4556]: k45FiXn4004548:
to=, delay=00:00:00, xdelay=00:00:00, mailer=local,
pri=31812, dsn=2.0.0, stat=Sent

Incorrect:
May 5 16:38:46 crystalbox sm-mta[13291]: k45Lckpj013291:
from=, size=1791, class=0, nrcpts=1,
msgid=<2542A3A1BFA18A4FBBDBA3E5EA1924DDAA31CF@sarah2.drury.edu>,
bodytype=8BITMIME, proto=ESMTP, daemon=MTA,
relay=bluecat.drury.edu [198.209.49.38]
May 5 16:38:46 crystalbox sm-mta[13292]: k45Lckpj013291:
to=, delay=00:00:00, xdelay=00:00:00, mailer=local,
pri=31995, dsn=2.0.0, stat=Sent

Does anyone have any advice? Thanks in advance.

Re: domain name resolution

cody@crystalbox.home.org wrote in
news:slrne5nj73.dfj.cody@crystalbox.home.org:

> Right now I have a domain crystalbox.org with an MX record which
> points to crystalbox.no-ip.org.

No.

crystalbox.org does not own an MX record, but it does own a CNAME
record pointing to crystalbox.no-ip.org. The CNAME record is
what's causing some mailservers to rewrite the domain in the RCPT
TO:

FYI, since crystalbox.org is a delegated domain name, and therefor
must own NS and SOA records (at least), it is not allowed to also
own a CNAME record. This is a "CNAME and other data" error (if a
name is an alias for another name, it can't also have records of
its own), and any nameserver that publishes such invalid data is
severely broken.

Apparently, ns3 and ns4.secureserver.net are running broken DNS
software that happily publishes rubish if that's what it's fed.
If you have control of the DNS records, you should replace:

crystalbox.org. CNAME crystalbox.no-ip.org.

with

crystalbox.org. MX 10 crystalbox.no-ip.org.
www.crystalbox.org. CNAME crystalbox.no-ip.org.

If you don't have control, you should pick a new DNS provider with
more clue.

- Fred

Re: domain name resolution

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cody@crystalbox.home.org writes:

> Right now I have a domain crystalbox.org with an MX record which points to
> crystalbox.no-ip.org.

No, you don't.

You have a crystalbox.org CNAME record for crystalbox.no-ip.org. You also
have acrystalbox.no-ip.org MX record for itself, but that's not the same
thing.

> This is one of those free dynamic hostnames. However I've
> noticed that when people try to send me mail at crystalbox.org, some messages
> get the domain switched to crystalbox.no-ip.org, example sendmail logs follow.

Some mail servers replace domains with CNAME records by domains the CNAME
records point to, and some don't.

That's what you're seeing.


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Re: domain name resolution

On Fri, 5 May 2006 cody@crystalbox.home.org wrote:

> Right now I have a domain crystalbox.org with an MX record which points to
> crystalbox.no-ip.org.

No you don't. You have:

crystalbox.org. 3555 IN CNAME crystalbox.no-ip.org.


--
Alan

( If replying by mail, please note that all "sardines" are canned.
There is also a password autoresponder but, unless this a very
old message, a "tuna" will swim right through. )