{"id":4124,"date":"2020-10-30T22:39:29","date_gmt":"2020-10-30T21:39:29","guid":{"rendered":"https:\/\/webhosting.de\/?p=4124"},"modified":"2025-02-19T18:55:46","modified_gmt":"2025-02-19T17:55:46","slug":"email-fra-webhosting-account-disconnect","status":"publish","type":"post","link":"https:\/\/webhosting.de\/da\/e-mail-von-webhosting-account-trennen\/","title":{"rendered":"Afbryd e-mail fra webhostingkonto"},"content":{"rendered":"

Der er n\u00e6ppe noget marked p\u00e5 internettet, der er s\u00e5 konkurrencepr\u00e6get som webhosting. Is\u00e6r i de lavere og mellemste prissegmenter underbyder udbyderne konstant hinanden p\u00e5 priserne for allround-sorgl\u00f8st-pakker. Ud over lagerplads omfatter de normalt et dom\u00e6ne, databaser og e-mail-konti. Komplette pakker er billige og absolut anbefalelsesv\u00e6rdige for begyndere. I professionel og erhvervsm\u00e6ssig brug kan der dog hurtigt opst\u00e5 problemer, is\u00e6r i forbindelse med e-mailkommunikation. I denne vejledning forklarer vi i detaljer, hvilke problemer der opst\u00e5r, og hvordan du kan forebygge dem. <\/p>\n

E-mailkommunikation i erhvervslivet: Problemer uden en separat e-mail-server<\/p>\n

If\u00f8lge sk\u00f8n sendes der ca. 1,5 milliarder e-mails hver dag i Tyskland. En stor del af disse er forretningsmails, der indeholder vigtige oplysninger. De fleste virksomheder er afh\u00e6ngige af, at deres e-mails med tilbud, ordre- og forsendelsesbekr\u00e6ftelser, nyhedsbreve og forretningskorrespondance n\u00e5r frem til modtageren til tiden. Med en billig udbyder af delt hosting er dette dog ikke altid garanteret. <\/p>\n

Delet webhosting betyder, at flere brugere deler en fysisk server. T\u00e6nk p\u00e5 serveren som en lejlighedskompleks med op til flere hundrede parter. Mens hver lejer har sit eget dom\u00e6ne, deler de en f\u00e6lles (IP-)adresse. De enkelte dom\u00e6ner rute til denne IP-adresse. Hvis en brugers websted nu bliver hacket, kan angriberen m\u00e5ske bruge sikkerhedshullet til at sende spam-mails via serveren. Dette har vidtr\u00e6kkende konsekvenser for alle brugere. <\/p>\n

IP-adresse ender p\u00e5 sorte lister<\/p>\n

Webmailudbydere registrerer automatisk en klynge spam fra en IP-adresse og rapporterer den til de forskellige sorte spamlister. Hvad betyder det for dig? Da mange e-mail-servere bruger sortlister til at sortere mails p\u00e5 forh\u00e5nd, kan serveren vurdere dine e-mails som spam og sortere dem fra. E-mails fra afsendere p\u00e5 den sorte liste n\u00e5r normalt ikke frem til modtageren. De bliver ofte slettet direkte eller ender i spam-mappen. Hvis webhotellet g\u00f8r en indsats og afhj\u00e6lper sikkerhedshullet, kan opf\u00f8relsen p\u00e5 den sorte liste \u00e6ndres. Desv\u00e6rre opdager mange af de ber\u00f8rte f\u00f8rst problemet, n\u00e5r barnet allerede er faldet i br\u00f8nden. Mange bliver f\u00f8rst opm\u00e6rksomme p\u00e5 det, n\u00e5r f.eks. de f\u00f8rste kunder eller forretningspartnere klager over, at de ikke f\u00e5r svar p\u00e5 e-mails.<\/p>\n

Problemet kan dog ikke kun p\u00e5virke dig p\u00e5 en delt hostingkonto, men ogs\u00e5 p\u00e5 en lejeserver, hvis du ikke har en separat e-mail-server. Hvis du f.eks. bruger open source-software p\u00e5 din server, f.eks. WordPress<\/a>Drupal eller Typo 3, er s\u00e6rlig forsigtighed tilr\u00e5deligt. P\u00e5 grund af deres udbredte brug er indholdsstyringssystemer popul\u00e6re m\u00e5l for angreb. N\u00e6sten dagligt dukker der nye sikkerhedshuller op, som der regelm\u00e6ssigt opdateres for. Enhver, der undlader at foretage en eller flere opdateringer, risikerer at f\u00e5 serveren hacket. Hvis der er installeret en mailserver p\u00e5 den ber\u00f8rte server, er der ogs\u00e5 en risiko for at blive sortlistet, hvis der sendes spam.<\/p>\n

L\u00f8sningen: strengt adskilt webhosting og e-mail-server<\/p>\n

En streng adskillelse af webhosting og e-mail-server reducerer risikoen for begr\u00e6nsninger i e-mail-kommunikationen p\u00e5 grund af hackerangreb. Du kan opn\u00e5 denne adskillelse ved at outsource dit websted til \u00e9n server og din e-mail-kommunikation til en vServer. Det er vigtigt, at begge servere har deres egen IP-adresse, og at ingen andre brugere bruger IP-adressen p\u00e5 din e-mail-server. Adskillelsen af underdom\u00e6ner til adgang til webstedet og til at sende post sker via DNS-posten (den s\u00e5kaldte MX-post). <\/p>\n

I praksis fungerer adskillelsen p\u00e5 f\u00f8lgende m\u00e5de:<\/p>\n

- Underdom\u00e6net mail.domain.de videresender til mailserverens IP-adresse.
\n- Underdom\u00e6net (underdom\u00e6nerne) www.domain.de og\/eller domain.de til webserverens IP-adresse.<\/p>\n

P\u00e5 denne m\u00e5de har du fuld kontrol over din IP-adresses omd\u00f8mme.<\/p>\n

Yderligere fordele ved adskillelse af Webspace<\/a> og e-mailkommunikation<\/p>\n

Det er ogs\u00e5 en fordel at adskille e-mail og webhosting i tilf\u00e6lde af en fejl hos en webhost. Normalt kan hverken dit websted eller din e-mailadresse n\u00e5s i dette tilf\u00e6lde. Via den separat opsatte e-mail-server kan du fortsat v\u00e6re tilg\u00e6ngelig for kunderne, selv hvis dit websted svigter.<\/p>\n

Adskillelsen giver ogs\u00e5 en sikkerhedsfordel. Hvis du driver din egen server til din webhosting, skal dens operativsystem og alle tilh\u00f8rende softwarepakker regelm\u00e6ssigt holdes opdateret. Med s\u00e5kaldte administrerede servere overtager webhotellet denne opgave. Med en selvadministreret server er kunden selv ansvarlig for dette. P\u00e5 servere, is\u00e6r mailfunktioner som Sendmail og Postfix<\/a> et popul\u00e6rt angrebspunkt for hackere. N\u00e5r du adskiller weblagring og e-mail, er det ikke n\u00f8dvendigt at installere en Mail Transfer Agent (MTA) p\u00e5 webserveren. Ved at adskille dem lukker du automatisk et sikkerhedshul. <\/p>\n

Ubegr\u00e6nset antal e-mail-adresser og lagerplads<\/p>\n

Endelig har det en anden fordel at k\u00f8re en separat server til e-mail-trafik: du har ingen begr\u00e6nsning p\u00e5 antallet af mulige e-mail-adresser sammenlignet med standardtilbud fra webhosts. Med e-mail-serveren p\u00e5 din egen vServer kan du oprette s\u00e5 mange postkasser, aliasser, autosvar og viderestillere, som du vil. Der er heller ingen begr\u00e6nsninger p\u00e5 lagerpladsen. De fleste webhosts begr\u00e6nser lagerpladsen til indg\u00e5ende e-mails i deres tilbud. En egen mailserver begr\u00e6nser kun lagerpladsen med st\u00f8rrelsen af harddisken.<\/p>","protected":false},"excerpt":{"rendered":"

Im Internet ist kaum ein Markt so umk\u00e4mpft wie das Webhosting. Vor allem im unteren und mittleren Preissegment unterbieten sich die Anbieter immer wieder bei den Preisen f\u00fcr Rundum-Sorglos-Pakete. Sie enthalten in der Regel neben Speicherplatz eine Domain, Datenbanken und E-Mail-Postf\u00e4cher. Komplettpakete sind g\u00fcnstig und f\u00fcr Einsteiger durchaus empfehlenswert. Im professionellen und gesch\u00e4ftlichen Einsatz kann 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