{"id":1614,"date":"2021-07-05T16:46:39","date_gmt":"2021-07-05T13:46:39","guid":{"rendered":"https:\/\/uzmanposta.com\/blog\/?p=1614"},"modified":"2021-07-13T17:49:19","modified_gmt":"2021-07-13T14:49:19","slug":"eposta-iletisiminiz-ne-kadar-guvenli","status":"publish","type":"post","link":"https:\/\/uzmanposta.com\/blog\/eposta-iletisiminiz-ne-kadar-guvenli\/","title":{"rendered":"E-posta \u0130leti\u015fiminiz Ne Kadar G\u00fcvenli?"},"content":{"rendered":"\n<p><strong>E-posta ileti\u015fimi<\/strong>, g\u00f6nderim ve eri\u015fim olmak \u00fczere ikiye ayr\u0131l\u0131r. Bu protokollerin g\u00f6nderimle ilgili olanlar\u0131 mesajlar\u0131n iletimiyle; eri\u015fimiyle ilgili olanlar\u0131 ise, e-posta hesap kutusunda bulunan mesajlara ula\u015fmak i\u00e7indir. G\u00f6nderilerin ta\u015f\u0131nmas\u0131, yani <strong>mesajlar\u0131n sunucular aras\u0131 iletimi<\/strong>, <strong>SMTP protokol\u00fc<\/strong> ile yap\u0131lmak zorundad\u0131r. Bunun d\u0131\u015f\u0131nda kalan kullan\u0131c\u0131lar\u0131n mesaj iletimi veya hesap kutusuna eri\u015fimi i\u00e7in birden fazla yol kullan\u0131labilir.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">TLS Nedir? TLS Kullan\u0131m\u0131 Neden Gereklidir?<\/h2>\n\n\n\n<p>Tarihsel olarak mesaj iletimi i\u00e7in kullan\u0131lan <strong>SMTP, <\/strong>mesajlara eri\u015fim i\u00e7in kullan\u0131lan <strong>POP3 <\/strong>ve <strong>IMAP protokolleri<\/strong> \u015fifrelenmi\u015f \u015fekilde \u00e7al\u0131\u015fm\u0131yordu. Hatta ilk kullan\u0131m d\u00f6nemlerinde bu protokoller ile yap\u0131lan eri\u015fimler i\u00e7in kimlik do\u011frulamas\u0131 bile zorunlu de\u011fildi. A\u011f eri\u015fimi olan her istemci veya ki\u015fi, mesaj g\u00f6ndererek varolan mesajlara eri\u015fip m\u00fcdahale edebiliyordu.&nbsp;<\/p>\n\n\n\n<p>Kimlik do\u011frulamas\u0131 zaman i\u00e7inde zorunlu hale geldi, fakat \u015fifreleme yine zorunlu tutulmad\u0131. Bu durumun olu\u015fturdu\u011fu g\u00fcvenlik problemlerini gidermek i\u00e7in, <strong>TLS <\/strong>yani <strong>Transport Layer Security<\/strong>&#8211;<strong>Ta\u015f\u0131ma Katman\u0131 G\u00fcvenli\u011fi <\/strong>kullan\u0131m\u0131 \u00e7\u00f6z\u00fcm oldu.<\/p>\n\n\n\n<p><strong>TLS<\/strong>\u2019nin ne i\u015fe yarad\u0131\u011f\u0131n\u0131 basit \u015fekilde anlatmak gerekirse; TLS, ileti\u015fim kuran ikili aras\u0131nda \u015fifreleme ve kimlik do\u011frulama i\u015flemidir. Bu g\u00fcvenlik \u00f6nlemi kullan\u0131lmaya ba\u015flad\u0131ktan sonra t\u00fcm sunucular TLS\u2019yi desteklemeye ba\u015flam\u0131\u015f olsa bile, eski g\u00fcvensiz protokollerin desteklenmesi, ge\u00e7mi\u015f ile uyumluluk a\u00e7\u0131s\u0131ndan mecburdu. Bu, pratikte, TLS\u2019nin mecburen veya tercihli kullan\u0131lmas\u0131 \u015feklinde sonu\u00e7 verdi. Sonunda kullan\u0131c\u0131lar\u0131 buna mecbur tutan veya isterse kullanmas\u0131na imkan veren hizmet sa\u011flay\u0131c\u0131lar\u0131 ortaya \u00e7\u0131kt\u0131.<\/p>\n\n\n\n<p>Mecburi g\u00fcvenli eri\u015fimi gerektiren protokollere gelince, bunlar da ayn\u0131 isimlerin sonuna S harfi eklenerek Secure-G\u00fcvenli olarak kodlanmaya ba\u015flad\u0131 ve di\u011ferlerinde ayr\u0131labilmesi i\u00e7in (yukar\u0131da SMTP, POP3 ve IMAP eri\u015fim protokollerinden k\u0131saca bahsetmi\u015ftik) farkl\u0131 hizmet portlar\u0131nda \u00e7al\u0131\u015ft\u0131r\u0131mlaya ba\u015fland\u0131.<\/p>\n\n\n\n<p>\u00d6rne\u011fin, 143 numaral\u0131 port \u00fczerinde <strong>IMAP<\/strong> hizmeti \u00e7al\u0131\u015f\u0131rken, ayn\u0131 protokol\u00fcn g\u00fcvenli olan\u0131 yani <strong>IMAPS <\/strong>ise, 993 numaral\u0131 port \u00fczerinde \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131. Bu \u015fekilde g\u00fcvenli hizmet vermek istemeyen hizmet sa\u011flay\u0131c\u0131s\u0131 sadece 143 port \u00fczerinden hizmet vermeyi tercih etti. Benzer kurallar 587 port \u00fczerinde \u00e7al\u0131\u015fan standart <strong>SMTP<\/strong> i\u00e7in <strong>SSMTP <\/strong>olarak 465 port \u00fczerinde, <strong>POP3<\/strong> i\u00e7in ise, <strong>POP3S <\/strong>olarak 995 port \u00fczerinde \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131. Elbette hepimizin kulland\u0131\u011f\u0131 webmail aray\u00fczleri de, 80 port \u00fczerinde \u00e7al\u0131\u015fan HTTP yerine, \u015fu an <strong>internetin defakto standart\u0131<\/strong> haline gelen <strong>HTTPS<\/strong> ile 443 port \u00fczerinde hizmet olarak sunuldu.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"756\" height=\"558\" src=\"https:\/\/uzmanposta.com\/blog\/wp-content\/uploads\/2021\/07\/guvenli.jpg\" alt=\"\" class=\"wp-image-1646\" srcset=\"https:\/\/uzmanposta.com\/blog\/wp-content\/uploads\/2021\/07\/guvenli.jpg 756w, https:\/\/uzmanposta.com\/blog\/wp-content\/uploads\/2021\/07\/guvenli-300x221.jpg 300w, https:\/\/uzmanposta.com\/blog\/wp-content\/uploads\/2021\/07\/guvenli-750x554.jpg 750w\" sizes=\"(max-width: 756px) 100vw, 756px\" \/><\/figure><\/div>\n\n\n\n<p>Hizmet sa\u011flay\u0131c\u0131lar \u015fu anda, verdikleri servisin t\u00fcr\u00fcne ve kullan\u0131c\u0131 z\u00fcmresinin taleplerine g\u00f6re, ayn\u0131 anda her iki tip eri\u015fimi de sa\u011flayabilir durumdalar. \u00d6zellikle bunu yapabilecek teknolojiye sahip olanlar, kullan\u0131c\u0131 tercihlerine g\u00f6re ayar yap\u0131lmas\u0131na olanak sa\u011fl\u0131yor. Bu da hizmet kalitesinin y\u00fckselmesine, g\u00fcvenli\u011fin direk hizmeti alan organizasyonlar taraf\u0131ndan s\u0131k\u0131la\u015ft\u0131r\u0131lmas\u0131na veya daha rahat bir \u015fekilde uygulanmas\u0131na izin veriyor.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>E-posta ileti\u015fimi, g\u00f6nderim ve eri\u015fim olmak \u00fczere ikiye ayr\u0131l\u0131r. Bu protokollerin g\u00f6nderimle ilgili olanlar\u0131 mesajlar\u0131n iletimiyle; eri\u015fimiyle ilgili olanlar\u0131 ise, e-posta hesap kutusunda bulunan mesajlara ula\u015fmak i\u00e7indir. G\u00f6nderilerin ta\u015f\u0131nmas\u0131, yani mesajlar\u0131n sunucular aras\u0131 iletimi, SMTP protokol\u00fc ile yap\u0131lmak zorundad\u0131r. Bunun d\u0131\u015f\u0131nda kalan kullan\u0131c\u0131lar\u0131n mesaj iletimi veya hesap kutusuna eri\u015fimi i\u00e7in birden fazla yol kullan\u0131labilir.&nbsp; TLS [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1617,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1614","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nedir-nasil-yapilir"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>E-posta \u0130leti\u015fiminiz Ne Kadar G\u00fcvenli? - Uzman Posta<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/uzmanposta.com\/blog\/eposta-iletisiminiz-ne-kadar-guvenli\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"E-posta \u0130leti\u015fiminiz Ne Kadar G\u00fcvenli? - Uzman Posta\" \/>\n<meta property=\"og:description\" content=\"E-posta ileti\u015fimi, g\u00f6nderim ve eri\u015fim olmak \u00fczere ikiye ayr\u0131l\u0131r. Bu protokollerin g\u00f6nderimle ilgili olanlar\u0131 mesajlar\u0131n iletimiyle; eri\u015fimiyle ilgili olanlar\u0131 ise, e-posta hesap kutusunda bulunan mesajlara ula\u015fmak i\u00e7indir. G\u00f6nderilerin ta\u015f\u0131nmas\u0131, yani mesajlar\u0131n sunucular aras\u0131 iletimi, SMTP protokol\u00fc ile yap\u0131lmak zorundad\u0131r. Bunun d\u0131\u015f\u0131nda kalan kullan\u0131c\u0131lar\u0131n mesaj iletimi veya hesap kutusuna eri\u015fimi i\u00e7in birden fazla yol kullan\u0131labilir.&nbsp; TLS [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/uzmanposta.com\/blog\/eposta-iletisiminiz-ne-kadar-guvenli\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/uzmanposta\/\" \/>\n<meta property=\"article:published_time\" content=\"2021-07-05T13:46:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-07-13T14:49:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/uzmanposta.com\/blog\/wp-content\/uploads\/2021\/07\/mesaj-iletisimi-guvenli-protokoller.png\" \/>\n\t<meta property=\"og:image:width\" content=\"750\" \/>\n\t<meta property=\"og:image:height\" content=\"375\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Sibel Ho\u015f\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@uZmanPosta\" \/>\n<meta name=\"twitter:site\" content=\"@uZmanPosta\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sibel Ho\u015f\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"E-posta \u0130leti\u015fiminiz Ne Kadar G\u00fcvenli? - Uzman Posta","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/uzmanposta.com\/blog\/eposta-iletisiminiz-ne-kadar-guvenli\/","og_locale":"tr_TR","og_type":"article","og_title":"E-posta \u0130leti\u015fiminiz Ne Kadar G\u00fcvenli? - Uzman Posta","og_description":"E-posta ileti\u015fimi, g\u00f6nderim ve eri\u015fim olmak \u00fczere ikiye ayr\u0131l\u0131r. 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