Iimayl lagu diray VPN: jawaabtu dhab ahaan halkee bay tagtaa

Waxaad farriin ku diraa tunnellada, waad gooyaa xiriirka, jawaabtuna waxay timaaddaa subaxda xigta. Wax ka mid ah taas uma baahna cinwaankii hore ee VPN, waxnana kama go'o. Iimaylku jawaabaha uma jiheeyo cinwaankii farriinta laga diray; waxay u jiheeyaa sanduuq boosto. Halkan saddex waddo ayaa ku biirta hal su'aal, kala soociddooduna waxay ka jawaabtaa inta badan walaaca.

Saddex waddo oo dadku hal uga dhigaan

Gudbin, gaarsiin iyo akhris saddex xiriir oo gooni ah, laba keliya ayaa qalabkaaga ku lug leh.

Submission: your mail app  -> your mail service
Delivery:   other mail service -> your mailbox service
Reading:    your app now -> your mailbox service

VPN waxay saameyn kartaa kan koowaad iyo kan saddexaad, sababtoo ah waa xiriirada qalabkaagu sameeyo. Ma saameyn karto kan labaad, sababtoo ah waddadaas waxay u dhaxaysaa laba server oo iimayl oo aadan maamulin. Jawaabtu ma aha baakad ku noqota cinwaankii aad ka dirtay. Waa farriin cusub oo adeegga iimaylka dhinaca kale u gaarsiiyo adeegga sanduuqa boostadaada.

Markaad saddexdan kala haysato, su'aasha ah jawaabtu ma ku heli doontaa ma noqoto mid qarsoodi ah.

Goobta Reply-To waa cinwaan, ma aha waddo

RFC 5322 waxay Reply-To ku qeexdaa sanduuqa boostada ama sanduuqyada boostada ee jawaabaha loo diro. Iyada la'aan, caadada caadiga ah waa sanduuqa From, haddii aan qofka jawaabaya qorin wax kale. Labaduba waa cinwaanno boosto oo ku jira madaxa. Midkoodna ma aha amar lagu dib u furo xiriirka shabakadda ee gudbiyay farriintii asalka ahayd.

Taasi waa sababta cinwaanka bixidda VPN aanu waligiis ka muuqan waddada jawaabta. Xitaa marka serverka gudbintu meel ka diiwaangeliyay cinwaankaas bixidda, jawaabtu waxay ku qoran tahay sanduuq boosto, serverka dirayaana wuxuu raadiyaa beddelka iimaylka domainka halkii uu ka raadin lahaa socketkii hore.

Haddii jawaabtu meel lama filaan ah tagto, akhri Reply-To iyo dejinta macmiilka diraha laftiisa ka hor intaadan tunnellada ka shakin.

Maxay madaxyada raadraacu dhab ahaan diiwaangeliyaan

JIMC kasta oo SMTP ah wuxuu hor dhigaa madax Received oo qeexaya xiriirka uu maareeyay, tan ugu sarreysaana waa tallaabadii ugu dambaysay ee gaarsiinta ka hor. Sidaas darteed farriin la gudbiyay waxay qaadi kartaa faahfaahin shabakadeed oo mudan in la eego, faahfaahintaasna waxaa qora serverro, ma aha adiga oo dooranaya. Waxa ay ka kooban yihiin waxay ku xiran tahay qaabka gudbinta bixiyaha iyo sida uu ula macaamilo madaxyada.

Akhri halkii aad qiyaasi lahayd, laga bilaabo farriin la kaydiyay:

grep -E '^(Received|Return-Path|Reply-To|From):' message.eml

Anshaxa faa'iidada leh waa in la garto adeegga lagu kalsoonaan karo ee ku daray goob kasta. Qoraal aan loo baahnayn oo hore ugu jira qaybta madaxyada ma aha caddayn lagu kalsoonaan karo, magaca badeecadna ma aha ballan joogto ah in cinwaanka gurigaagu had iyo jeer jiro ama had iyo jeer maqan yahay.

Iimaylka dambe akhrintiisu waa xiriir cusub

Markaad jawaabta furto, macmiilkaagu wuxuu ku xirmayaa adeegga sanduuqa boostadaada shabakadda aad hadda ku jirto. Kani waa xiriir cusub oo leh cinwaankiisa laga soo bilaabay, ma aha sii socoshada socketkii gudbinta shalay. Wuxuu raacaa siyaasadda hadda jirta ee shabakadda aad wakhtigaas isticmaalayso.

Nuxurka fog waa wax saddexaad oo kale. Macmiilka iimaylka ee soo raraya sawir fog ama raacaya xiriir wuxuu sameeyaa codsi gooni ah sida uu dejintiiisu hadda tahay, codsigaasna wuxuu qaadi karaa aqoonsi kasta oo farriintu ku dartay. Ma aha jawaabta SMTP ee yimaadda cinwaan hore, oo in sidaas loo arko waxay qarinaysaa soo-gaadhista dhabta ah.

Dami nuxurka fog haddii aad rabto inaad farriin akhrido adigoon ku dhawaaqin inaad furatay.

Maxaa la hubinayaa ka hor intaadan ugu yeerin daadin

Ku bilow aragtida farriinta asalka ah iyo goobta Reply-To. Kadib garo adeegga ku daray gelitaannada Received ee kaa welwelaya, oo la barbardhig dokumentiyaha hadda jira ee bixiyaha ee ma aha jawaab shaashad hore.

Ugu dambayn, kala sooc su'aalaha: maxaa serverka gudbintu arkay, maxaa silsiladda gaarsiintu ku dartay, iyo maxaa macmiilkaagu codsaday markii aad farriinta furtay?

Saddexdan si gooni ah uga jawaabiddu waa shaqo ka badan in la eego bogga IP, waana nuqulka keliya ee soo saara gabagabo aad difaaci karto. Jawaab u celin cinwaan iimayl ma muujiso cinwaanka gurigaaga, umana baahna in tunnelladii hore furan ahaato.