OT: mail routing

stano na trillian.eunet.sk stano na trillian.eunet.sk
Pátek Červen 18 17:27:50 CEST 1999


On 18 Jun 1999 15:44:39 +0200, Michal Krause wrote:

: Dotaz zni: definuje nejake RFC, ze by se v pripade nepritomnosti MX 
: zaznamu pro domenu pouzila pri dorucovani IP adresa z A zaznamu?

"Odjakziva" to tak fungovalo.

: Podle mne je to nesmysl, ale skutecne se to zrejme v praxi deje.

Preco nezmysel? - ako default je to celkom rozumne riesenie.
Tieto veci vznikali v casoch, ked sa internet nehemzil
vselijakymi firewallmi, jeden clovek nepisal postu z desiatok
pocitacov a internet provideri nezbierali postu pre
tisicky pouzivatelov :-) A ked to tak raz je, zmena
je uz nemozna.

: V RFC 974 (MAIL ROUTING AND THE DOMAIN SYSTEM) se mluvi vyhradne o MX 
: zaznamech.

Kedze locate povedal, ze toto rfc sa mi na disku
nahodou vala, pozrel som na to. Treba citat
pozornejsie: :-)

   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.


Zdravi
-- 
				Stano



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