Re: [ga] Godaddy mail hostname = spam errors and possible security issue?

[Hugo Monteiro <hugo.monteiro@xxxxxxxxxx>]

On 04/30/2010 10:04 PM, Andy Gardner wrote:
> Godaddy appears to use "made up" hostnames for SMTP HELO entries...
>    
Hello Andy,

That is in fact a shame, since the sending hostname DOES have a proper 
DNS setup. Even so, RFC5321 does not mandate that the correct HELO is to 
be provided. From section 4.1.1.1 we can extract:
"(...) The argument clause contains the fully-qualified domain name of 
the SMTP client, if one is available. In situations in which the SMTP 
client system does not have a meaningful domain name (e.g., when its 
address is dynamically allocated and no reverse mapping record is 
available), the client SHOULD send an address literal (...)"

> Received:       from unknown (HELO gdmailer03.dc1.corp.gd) (208.109.14.188) by 
> m1relayapp01-01.prod.mesa1.secureserver.net with SMTP
>
> I can see a couple of problems with this.
>
> 1. Many antiSPAM measure reject mail from unknown hosts.
>    

True, but that's actually their own problem. If their mail gets 
rejected, tough luck.

> 2. corp.gd is a legitimate domain name owned by someone else than than Godaddy.
>
> Domain Name:               corp.gd
>
> Registrant, Technical Contact, Billing Contact, Admin. Contact
>    SRA, MII
>    Private Registration, b-dul Unirii 80, Bacau, , , , ramsmith59@xxxxxxxxx
>    Romania
>    E-mail:                  domainmailfwd@xxxxxxxxx
>    Phone:                   1.44.7833722420
>    Fax:                     1.40.72729289
>
> Resource Records (2):
>                             ns      ns1.register.com
>                             ns      ns2.register.com
>
>
> One wonders how a major ICANN approved registrar can make such basic technical 
> errors, and leave them in place for YEARS?
>
>
>    

One possibility is that they have contracted a mailing service from a 
company (corp.gd), which happens to be Godaddy client for a conectivity 
package, in Godaddys own ip netblock.

R's,

Hugo Monteiro.

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Hugo Monteiro
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