ðåñß spam êáé åðß ôá áõôÜ

[Aristotelis]

On 2004-03-12, Thanos Kyritsis <djart at linux.gr> wrote:
> Ôé ìå åìðïäßæåé åìÝíá áõôÞ ôç óôéãìÞ íá âÜëù óôï From ìïõ root áô uoa 
> êáé íá ÷ñçóéìïðïéÞóù ôï SMTP ôçò forthnet þóôå íá óôåßëù ôá e-mails 
> ìïõ ?? Ôßðïôá. 
  
   Parola ayta den se swzei to spf amesa.

> Áõôü óçìáßíåé üôé ìðïñåß ôï ßäéï ðñÜãìá íá ôï êÜíåé êáé Ýíáò spammer. Èá 
> âÜëåé óôï From ôïõ ôï äéêü ìïõ e-mail êáé èá spammÜñåé ôïí êüóìï üëï. 
> Ôá bounces èá ôá ëÜâù åãþ, üìùò.
>
> Ôï SPF êÜíåé ôï åîÞò: åãþ óôÝëíù mail êáé éó÷õñßæïìáé üôé åßìáé ï 
> ôáäå@TADE.gr. Ï MTA ðïõ ëáìâÜíåé ôï mail ìïõ êáé ðÜåé íá ôï óôåßëåé 
> óôïí recipient, ðÜåé êáé ñùôÜåé ôïí MX ôïõ TADE.gr ãéá ôï áí ç IP ìïõ 
> åßíáé áðïäåêôÞ.

  Na prosthesw ta .02 euro moy sto thema :pp

 To systhma toy uoa antimetwpizei ws twra ta eswterika spams. 
Lew ws twra giati pisteyw oti den tha argisoyne na bgoyne 
spam engines (an den exoyne hdh bgei) poy na antimetwpizoyne kai to 
auth kai to SSL kai oti skata syndyasmo arxikwn apofasisei na 
egkatasthsei o ermos administrator.

 Se ena paradeisenio kosmo tha eixame oloi ayto to systhma kai
den tha yphrxe spam, ektos apo 1-2 isws providers, toys ekanes 
blacklist kai lynotane to thema. Alla dystyxws ta pragmata den 
einai etsi.

 To spf prospathei na antimetwpisei ta probs ayta basismeno sto 
DNS. Kai edw einai ena megalo thema: POSOI tha to exoyne swsta
balmeno to DNS? Edw pera para polys kosmos den exei sthsei
swsta ta apla MX records toy.(Px na bazei san MX kapoio CNAME
enw to leei kathara oti prepei na exeis A record). EPomenws to 
spf dhmioyrgei mia seira apo alla problhmata :). kai akomh 
den kserw posoi to exoyne yiothethsei.
 Epishs ena kalo krithrio gia spam einai na deis an o host poy
soy stelnei to email kai soy leei oti einai apo to tade einai
sta MX records toy domain aytoy (me to sendmail mporeis na to 
kaneis apo oti kserw) [Ayto basizetai sto assumption oti 
anakoinwneis kai ta eswterika kai ta ekswterika MX records soy
h oti einai ta idia] [Yparxoyne kai alla empeirika krhthria
opws kai h xrhsh twn RBL]

 To megalytero problhma me to spam bebaia einai apo dsl hosted
grammes poy xrhsimopoioyne ton kanoniko smtp server toy provider
alla exei mpei o beelzeboylhs sta pc toys kai stelnei synexws
spam.

 Ti thelw na pw me ola ayta. Oti to thema toy spam einai arketa
megalo. Yparxoyne kapoies lyseis poy proteinontai alla dystyxws
akomh kammia den fainetai na lynei to problhma (to basika problhma
einai pws oi spammers bgazoyne lefta (oso kai an akoygetai 
apisteyto) apo ayth thn istoria, kai pragmatika otan kapoios thelei
na bgalei lefta ginetai arketa eksypnos).

   Filika, 
 Aristotelis