SPAM s mojou spiatocnou adresou

[Pavel Kankovsky]

On Tue, 20 May 2003, Honza Houstek wrote:

> AFAIK nic nenarizuje posilani bouncu, pokud se pletu, tak me tu urcite
> nekdo opravi.

RFC 2821, cast 3.7

   If an SMTP server has accepted the task of relaying the mail and
   later finds that the destination is incorrect or that the mail cannot
   be delivered for some other reason, then it MUST construct an
   "undeliverable mail" notification message and send it to the
   originator of the undeliverable mail (as indicated by the reverse-
   path).

a cast 6.1

   If there is a delivery failure after acceptance of a message, the
   receiver-SMTP MUST formulate and mail a notification message.

Cili jakmile server nejaky dopis akceptuje a pozdeji zjisti, ze ho nemuze
dorucit, pak je povinnen ho vratit resp. se to aspon pokusit. Zahozeni
v pripade, ze se primerene spolehlive zjisti, ze je to spam, by slo
povazovat za akceptovatelnou vyjimku, protoze u spamu je temer jiste, ze
by se to vraceni stejne nepodarilo (resp. podarilo, ale na uplne spatne
misto).

Jinak k puvodnimu tematu: spravne reseni je nejakym zpusobem zaridit, aby
ty vracene spamy byly odmitany uz behem SMTP, idealne s patricnym
vysvetlujicim hlasenim. Bohate to staci zaridit na hlavnim MX, protoze
za normalniho provozu se ty dalsi pouzivaji jen vyjimecne (nebo aspon by
mely, pokud to ma byt nazyvano normalni provoz). Bez ohledu na to, kolik
to usetri prenosove kapacity (a verim, ze nekde to muze byt dulezita
uspora), to problem posouva o krok zpet k jeho puvodci. Kdyz budete ty
bouncy odmitat, tak se s nimi budou muset vyporadat ti, co je odesilaji,
tj. ti, ktery ty spamy chodi. A tech je mnoho, procez pripadna odvetna
akce vuci puvodci spamu (at uz bude mit charakter stiznosti na ISP nebo
jiny) bude ucinnejsi.


--Pavel Kankovsky aka Peak  [ Boycott Microsoft--http://www.vcnet.com/bms ]
"Resistance is futile. Open your source code and prepare for assimilation."