How to use the Real-Time Black List Lookup diagnostic tool to test SMTP IP addresses

Subscribe to newsletter

Stay In Touch

• Email Address*
• By submitting this form, you agree to our Terms of Use and acknowledge our Privacy Statement. You can unsubscribe at any time from the Preference Center.
• Hidden
  Country
  Select CountryAfghanistanAland IslandsAlbaniaAlgeriaAmerican SamoaAndoraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBolivia, Plurinational State ofBonaire, Sint Eustatius and SabaBosnia And HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBrunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChinese TaipeiChristmas IslandCocos (Keeling) IslandsColombiaComorosCongoCongo, the Democratic Republic of theCook IslandsCosta RicaCote d'IvoireCroatiaCubaCuraçaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland Islands (Malvinas)Faroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuamGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and McDonald IslandsHoly See (Vatican City State)HondurasHong Kong ChinaHungaryIcelandIndiaIndonesiaIran, Islamic Republic ofIraqIrelandIsle of ManIsraelItalyJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKorea, Democratic People's Republic ofKorea, Republic ofKuwaitKyrgyzstanLao People's Democratic RepublicLatviaLebanonLesothoLiberiaLibyan Arab JamahiriyaLiechtensteinLithuaniaLuxembourgMacao ChinaMacedonia, the former Yugoslav Republic ofMadagascarMalawiMalaysiaMaldivesMaliMaltaMarshall IslandsMartiniqueMauritaniaMauritiusMayotteMexicoMicronesiaMoldova, Republic ofMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorthern Mariana IslandsNorwayOmanPakistanPalauPalestinian Territory, OccupiedPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalPuerto RicoQatarReunionRomaniaRussian FederationRwandaSaint BarthélemySaint Helena, Ascension and Tristan da CunhaSaint Kitts and NevisSaint LuciaSaint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSamoaSan MarinoSao Tome and PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSint Maarten (Dutch part)SlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia and the South Sandwich IslandsSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyrian Arab RepublicTajikistanTanzania, United Republic ofThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited KingdomUnited States of AmericaUruguayUzbekistanVanuatuVenezuela, Bolivarian Republic ofViet NamVirgin Islands, BritishVirgin Islands, U.S.Wallis and FutunaWestern SaharaYemenZambiaZimbabwe
• Hidden
  Company
• Hidden
  States
  Australian Capital TerritoryNew South WalesNorthern TerritoryQueenslandSouth AustraliaTasmaniaVictoriaWestern AustraliaAcreAlagoasAmapáAmazonasBahiaCearáDistrito FederalEspírito SantoGoiásMaranhãoMato GrossoMato Grosso do SulMinas GeraisParáParaíbaParanáPernambucoPiauíRio de JaneiroRio Grande do NorteRio Grande do SulRondôniaRoraimaSanta CatarinaSão PauloSergipeTocantinsAlbertaBritish ColumbiaManitobaNew BrunswickNewfoundland and LabradorNorthwest TerritoriesNova ScotiaNunavutOntarioPrince Edward IslandQuebecSaskatchewanYukon TerritoriesAnhuiBeijingChinese TaipeiChongqingFujianGansuGuangdongGuangxiGuizhouHainanHebeiHeilongjiangHenanHong KongHubeiHunanJiangsuJiangxiJilinLiaoningMacaoNei MongolNingxiaQinghaiShaanxiShandongShanghaiShanxiSichuanTianjinXinjiangXizangYunnanZhejiangAlsaceAquitaineAuvergneBurgundyBrittanyCentre-Val de LoireChampagne-ArdenneCorsicaFranche-ComtéIle-de-FranceLanguedoc-RoussillonLimousinLorraineLower NormandyMidi-PyrénéesNord-Pas-de-CalaisPays de la LoirePicardyPoitou-CharentesProvence-Alpes-Cote d'AzurRhône-AlpesUpper NormandyBaden-WurttembergBavariaBerlinBrandenburgBremenHamburgHesseLower SaxonyMecklenburg-VorpommernNorth Rhine-WestphaliaRhineland-PalatinateSaarlandSaxonySaxony-AnhaltSchleswig-HolsteinThuringiaAndaman and Nicobar IslandsAndhra PradeshArunachal PradeshAssamBiharChandigarhChhattisgarhDadra and Nagar HaveliDaman and DiuDelhiGoaGujaratHaryanaHimachal PradeshJammu and KashmirJharkhandKarnatakaKeralaLakshadweepMadhya PradeshMaharashtraManipurMeghalayaMizoramNagalandOdishaPuducherryPunjabRajasthanSikkimTamil NaduTelanganaTripuraUttar PradeshUttarakhandWest BengalCarlowCavanClareCorkDonegalDublinGalwayKerryKildareKilkennyLaoisLeitrimLimerickLongfordLouthMayoMeathMonaghanOffalyRoscommonSligoTipperaryWaterfordWestmeathWexfordWicklowAgrigentoAlessandriaAnconaAostaArezzoAscoli PicenoAstiAvellinoBariBarletta-Andria-TraniBellunoBeneventoBergamoBiellaBolognaBolzanoBresciaBrindisiCagliariCaltanissettaCampobassoCarbonia-IglesiasCasertaCataniaCatanzaroChietiComoCosenzaCremonaCrotoneCuneoEnnaFermoFerraraFlorenceFoggiaForlì-CesenaFrosinoneGenoaGoriziaGrossetoImperiaIserniaL'AquilaLa SpeziaLatinaLecceLeccoLivornoLodiLuccaMacerataMantuaMassa and CarraraMateraMedio CampidanoMessinaMilanModenaMonza and BrianzaNaplesNovaraNuoroOgliastraOlbia-TempioOristanoPaduaPalermoParmaPaviaPerugiaPesaro and UrbinoPescaraPiacenzaPisaPistoiaPordenonePotenzaPratoRagusaRavennaReggio CalabriaReggio EmiliaRietiRiminiRomeRovigoSalernoSassariSavonaSienaSondrioSyracuseTarantoTeramoTerniTrapaniTrentoTrevisoTriesteTurinUdineVareseVeniceVerbano-Cusio-OssolaVercelliVeronaVibo ValentiaVicenzaViterboAichiAkitaAomoriChibaEhimeFukuiFukuokaFukushimaGifuGunmaHiroshimaHokkaidoHyogoIbarakiIshikawaIwateKagawaKagoshimaKanagawaKochiKumamotoKyotoMieMiyagiMiyazakiNaganoNagasakiNaraNiigataOitaOkayamaOkinawaOsakaSagaSaitamaShigaShimaneShizuokaTochigiTokushimaTokyoTottoriToyamaWakayamaYamagataYamaguchiYamanashiAguascalientesBaja CaliforniaBaja California SurCampecheChiapasChihuahuaCoahuilaColimaDurangoFederal DistrictGuanajuatoGuerreroHidalgoJaliscoMexico StateMichoacánMorelosNayaritNuevo LeónOaxacaPueblaQuerétaroQuintana RooSan Luis PotosíSinaloaSonoraTabascoTamaulipasTlaxcalaVeracruzYucatánZacatecasAndalucíaAragonAsturias Principado deCanariasCantabriaCastilla y LeonCastilla-La ManchaCatalunyaCeutaExtremaduraGaliciaIlles BalearsLa RiojaMadrid, Comunidad deMelillaMurciaNavarraPais VascoValencianaBlekingeDalarnaGavleborgGotlandHallandJamtlandJonkopingKalmarKronobergNorrbottenOrebroOstergötlandSkaneSodermanlandStockholmUppsalaVarmlandVasterbottenVastmanlandVastra GotalandEnglandNorthern IrelandScotlandWalesAlabamaAlaskaAmerican SamoaArizonaArkansasArmed Forces AmericasArmed Forces EuropeArmed Forces PacificCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFederated MicronesiaFloridaGeorgiaGuamHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarshall IslandsMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaNorthern Mariana IslandsOhioOklahomaOregonPalauPennsylvaniaPuerto RicoRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUnited States Minor Outlying IslandsUS Virgin IslandsUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyomingNot Listed
• Hidden
  Dnb- ZIP
• Hidden
  Dnb- Phone
• Hidden
  elqCampaignId
• Hidden
  elqTrackId
• Hidden
  utm_campaign
• Hidden
  utm_medium
• Hidden
  utm_source
• Hidden
  utm_term
• Hidden
  utm_content
• Hidden
  gclid
• Hidden
  sfdc_campaign_id
• Hidden
  DnB - Address
• Hidden
  DnB - First Name
• Hidden
  DnB - Last Name
• Hidden
  DnB - Duns
• Hidden
  DnB - Global Ult (HQ) DUNS
• Hidden
  DnB - Global Ult (HQ) Company
• Hidden
  DnB - Employee Count
• Hidden
  DnB - Trade Name
• Hidden
  DnB - Currency
• Hidden
  DnB - Vanity Title
• Hidden
  DnB - Country
• Hidden
  DnB - State
• Hidden
  DnB - Zip
• Hidden
  DnB - City
• Hidden
  DnB - Global Employee Count
• Hidden
  DnB - SIC Code
• Hidden
  DnB - SIC Description
• Hidden
  DnB - NAICS Code
• Hidden
  DnB - NAICS Description
• Hidden
  DnB - Revenue
• Hidden
  DnB - Domain
• Hidden
  DnB - Business Phone
• Hidden
  DnB - Company
• Hidden
  DnB - DataSource
• Hidden
  DnB - DMACode
• Hidden
  DnB - EmployeeRange
• Hidden
  DnB - Fortune1000
• Hidden
  DnB - Fortune200
• Hidden
  DnB - Industry
• Hidden
  DnB - Postal Code
• Hidden
  DnB - PrimarySIC
• Hidden
  DnB - SubIndustry
• Hidden
  DnB - PrimaryNAICS
• Hidden
  DnB - StockTicker
• Hidden
  DnB - Revenue Range
• Hidden
  DnB - State or Province
• Hidden
  DnB - Website
• Name
  This field is for validation purposes and should be left unchanged.