Re: lug-bg: fscking Verisign ! ;-(

[Hristo Erinin <erinin@xxxxxxxxx>]

Здравейте,

On Wed, 17 Sep 2003 11:29:42 +0300
Plamen Tonev <micro@xxxxxxxxx> wrote:

> On 17 Sep 2003 10:44:10 +0300
> Ivaylo Toshev <ivo@xxxxxxxxxxxxxx> wrote:
> 
> > Abe neznam , obache spokoino mojete da prashtate debeli mails na
> > root@xxxxxxxxxxxxxxxxxxxxx ili .net ;-)
> 
> Не точно - 'щото няма MX records за каквото-си-искаме.нет/ком ;-))))
> 

И двамата нещо сте се възбудили :)

Можете да пращате колкото искате дебели mail на 
root@xxxxxxxxxxxxxxxxxxxxx, но единственото което ще постигнете е да 
напълните собствените си дискове. Пощата ще се връща не по причина, 
че kakvoto-si-iskate.com няма MX, а защото Verisign ползват Snubby 
Mail Rejector Daemon v1.3, който не случайно се казва така. Единствената 
му работа е да reject-не пощичката която се опитвате да пратите.

Според RFC 974 http://www.faqs.org/rfcs/rfc974.html
[quote]
   It is possible that the list of MXs in the response to the query will
   be empty.  This is a special case.  If the list is empty, mailers
   should treat it as if it contained one RR, an MX RR with a preference
   value of 0, and a host name of REMOTE.  (I.e., REMOTE is its only
   MX).  In addition, the mailer should do no further processing on the
   list, but should attempt to deliver the message to REMOTE.  The idea
   here is that if a domain fails to advertise any information about a
   particular name we will give it the benefit of the doubt and attempt
   delivery.
[\quote]


$ telnet kakvoto-si-iskate.com 25
Trying 64.94.110.11...
Connected to sitefinder-idn.verisign.com.
Escape character is '^]'.
220 snubby1-wceast Snubby Mail Rejector Daemon v1.3 ready
HELO test
250 OK
MAIL FROM: <root@xxxxxxxxxxxxxxxxxxxxx>
250 OK
RCPT TO: <root@xxxxxxxxxxxxxxxxxxxxx>
250 OK
data
550 User domain does not exist.
data
250 OK
221 snubby1-wceast Snubby Mail Rejector Daemon v1.3 closing transmission channel
Connection closed by foreign host.

Според RFC 821 кодове за грешка започващи с 5 означават permanent rejection.
Е, Snubby Mail Rejector е малко бъгав, след като му подадем още една data команда 
ни отвръща с 250 и затваря сесията.

-- 
Best Regards,
Hristo Erinin
	
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