
nollisting

ee-mell spam key khilaf electronic mell domen naamon kii raksha karane key liye ack takneek koo diyaa gayaa naam nollisting haye.
internet parr pratyek domen naam mein ack yaa adhik mx record kii ack shrinkhala hoti haye joe usa domen kii or seey email sandeshon koo sweekaar karane key liye jimmedaar mell server koo nirdisht kartaa haye, pratyek koo vareeyata key saath. nollisting kewal ack mx record koo jodana haye joe ack gair-maujood server koo "praathamik" (i.ee. joe sabse cumm bhaarit moolya key saath)-jiska arth haye kii ack praarambhik mell sampark hamesha whiffle rahega. kaee spam srot viphalata parr phir seey prayaas naheen karate hain, isaliye spam agale peedit key paas jaayega-jabaki vaidh email server koo agale uchch sankhya vaale mx koo phir seey prayaas karna chaahiye, aur samanya email kewal ack chhoti see deree key saath vitarit kiya jaayega.
karyanvayan.
mx record kaa ack saral udaaharan joe takneek koo pradarshit kartaa haih
 mx 10 dummy.udaaharan key liye.comm.
 mx 20 vaastavik-praathamik-mell-server.udaaharan key liye.comm.
yeh spam karyakramon koo parajit kartaa haye joe kewal uchchatam prathamikta (sabse cumm sankhya vaale) mx seey judate hain aur agali prathamikta mx koo phir seey karane key maanak truti-sanchaalan kaa paalan naheen karate hain.
samaan takneeken.
aisee vaikalpik takneeken hain joe gair-uttardaayi logon key beach vaidh mx record koo "sandwich" karane kaa sujhaav detee hain. kuchh prakaar hamesha 4xx trutiyon (i.ee. "baad mein phir seey prayaas karein").
mx record kaa ack saral udaaharan joe takneek koo pradarshit kartaa haih
 mx 10 dummy1.example.comm.
 mx 20 vaastavik-praathamik-mell-server.udaaharan key liye.comm.
 mx 30 dummy2.example.comm.
gray listing iss tathya parr bhee nirbhar karati haye kii spammers aksar custom software kaa upayog karate hain joe sahee aar. aff. see.-anuroop tareeke seey sandesh dene key liye dridh naheen rahega.

