{"id":5444,"date":"2025-12-19T20:33:24","date_gmt":"2025-12-19T20:33:24","guid":{"rendered":"https:\/\/mgcomdev.wpenginepowered.com\/glossary\/smtp-relay-2\/"},"modified":"2026-09-09T01:21:07","modified_gmt":"2026-09-09T01:21:07","slug":"smtp-relay","status":"publish","type":"glossary","link":"https:\/\/www.mailgun.com\/de\/glossar\/smtp-relay\/","title":{"rendered":"SMTP-Relay"},"content":{"rendered":"<h1>SMTP-Relay<\/h1>\n<p><span data-contrast=\"none\">SMTP-Relay bezeichnet den Prozess der \u00dcbertragung von E-Mail-Nachrichten zwischen E-Mail-Servern mithilfe von SMTP. Wenn Sie beispielsweise eine E-Mail von Ihrer App an den SMTP-Endpunkt von Mailgun senden, fungiert Mailgun als Relay und leitet die Nachricht an den Server des Empf\u00e4ngers weiter. Relay-Dienste k\u00f6nnen sein:<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<ul>\n<li><b><span data-contrast=\"none\">Offene Relays<\/span><\/b><b><span data-contrast=\"none\">:<\/span><\/b><span data-contrast=\"none\">\u00a0<\/span><span data-contrast=\"none\">\u00f6<\/span><span data-contrast=\"none\">ffentlich zug\u00e4nglich und oft missbraucht (nicht empfohlen)<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<li><b><span data-contrast=\"none\">Geschlossene Relays<\/span><\/b><b><span data-contrast=\"none\">:<\/span><\/b><span data-contrast=\"none\">\u00a0<\/span><span data-contrast=\"none\">e<\/span><span data-contrast=\"none\">rlauben nur authentifizierten, internen oder genehmigten Datenverkehr<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"none\">Die meisten ESPs (wie\u00a0Mailgun)\u00a0<\/span><span data-contrast=\"none\">betreiben<\/span><span data-contrast=\"none\">\u00a0geschlossene SMTP-Relays, um sich vor Missbrauch zu sch\u00fctzen<\/span><span data-contrast=\"none\">.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>SMTP-Relay SMTP-Relay bezeichnet den Prozess der \u00dcbertragung von E-Mail-Nachrichten zwischen E-Mail-Servern mithilfe von SMTP. Wenn Sie beispielsweise eine E-Mail von Ihrer App an den SMTP-Endpunkt von Mailgun senden, fungiert Mailgun als Relay und leitet die Nachricht an den Server des Empf\u00e4ngers weiter. Relay-Dienste k\u00f6nnen sein:\u00a0 Offene Relays:\u00a0\u00f6ffentlich zug\u00e4nglich und oft missbraucht (nicht empfohlen)\u00a0 Geschlossene Relays:\u00a0erlauben [&hellip;]<\/p>\n","protected":false},"author":73,"template":"","meta":{"_acf_changed":false},"class_list":["post-5444","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SMTP-Relay\u00a0\u2013 Glossar der E-Mail-Begriffe | Mailgun<\/title>\n<meta name=\"description\" content=\"Ein SMTP-Relay (auch E-Mail-Relay genannt) bezeichnet den Prozess zur \u00dcbertragung ausgehender E-Mails. 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