{"id":101456,"date":"2021-09-29T16:22:36","date_gmt":"2021-09-29T14:22:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/novaya-versiya-pochtovogo-servera-exim-4-95"},"modified":"2021-09-29T16:22:36","modified_gmt":"2021-09-29T14:22:36","slug":"novaya-versiya-pochtovogo-servera-exim-4-95","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/novaya-versiya-pochtovogo-servera-exim-4-95","title":{"rendered":"Nov\u00e1 verzia po\u0161tov\u00e9ho servera Exim 4.95","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bol vydan\u00fd po\u0161tov\u00fd server Exim 4.95, do ktor\u00e9ho boli zahrnut\u00e9 nahromaden\u00e9 opravy a pridali sa nov\u00e9 funkcie. Pod\u013ea septembrov\u00e9ho automatizovan\u00e9ho prieskumu viac ako mili\u00f3na po\u0161tov\u00fdch serverov, podiel Exim \u010din\u00ed 58% (pred rokom 57,59%), Postfix sa pou\u017e\u00edva na 34,92% (34,70%) po\u0161tov\u00fdch serveroch, Sendmail \u2014 3,52% (3,75%), MailEnable \u2014 2% (2,07%), MDaemon \u2014 0,57% (0,73%), Microsoft Exchange \u2014 0,32% (0,42%).       Hlavn\u00e9 zmeny:  <\/p>\n<ul>\n<li class=\"l\"> Bola ozn\u00e1men\u00e1 stabiln\u00e1 podpora re\u017eimu spracovania frontu spr\u00e1v fast-ramp, ktor\u00fd umo\u017e\u0148uje ur\u00fdchli\u0165 za\u010diatok doru\u010dovania spr\u00e1v pri ve\u013ekej ve\u013ekosti frontu na odosielanie a existencii zna\u010dn\u00e9ho po\u010dtu spr\u00e1v smerovan\u00fdch k typov\u00fdm hostite\u013eom, napr\u00edklad pri prenose ve\u013ek\u00e9ho mno\u017estva e-mailov ve\u013ek\u00fdm poskytovate\u013eom e-mailu alebo pri odosielan\u00ed cez medzit\u00fdmneho agenta prenosu spr\u00e1v (smarthost). Ak je re\u017eim zapnut\u00fd pomocou mo\u017enosti \u201equeue_fast_ramp\u201c a dvojstup\u0148ov\u00e9 spracovanie frontu (\u201e-qq\u201c) zist\u00ed pr\u00edtomnos\u0165 ve\u013ekej porcie spr\u00e1v adresovan\u00fdch konkr\u00e9tnemu po\u0161tov\u00e9mu <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-shicago\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2902\">serveru<\/a>, doru\u010denie pre dan\u00e9ho hostite\u013ea bude zah\u00e1jen\u00e9 okam\u017eite.\n<li class=\"l\"> Bola stabilizovan\u00e1 alternat\u00edvna implement\u00e1cia mechanizmu SRS (Sender Rewriting Scheme) \u2014 \u201eSRS_NATIVE\u201c, ktor\u00e1 nevy\u017eaduje vonkaj\u0161ie z\u00e1vislosti (star\u00e9 experiment\u00e1lne rie\u0161enie si vy\u017eadovalo in\u0161tal\u00e1ciu kni\u017enice libsrs_alt). SRS umo\u017e\u0148uje prep\u00edsa\u0165 adresu odosielate\u013ea pri preposielan\u00ed bez poru\u0161enia kontrol SPF (Sender Policy Framework) a zabezpe\u010duje zachovanie \u00fadajov o odosielate\u013eovi pre nasmerovanie <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-prohoster\/\"   title=\"serverom\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3022\">serverom<\/a> spr\u00e1v v pr\u00edpade chyby doru\u010denia. Podstata met\u00f3dy spo\u010d\u00edva v tom, \u017ee pri nadv\u00e4zovan\u00ed spojenia sa pren\u00e1\u0161aj\u00fa \u00fadaje o identite s p\u00f4vodn\u00fdm odosielate\u013eom, napr\u00edklad pri prepise alice@example.org na alice@example.com sa uvedie \u201eSRS0=HHH=TT=example.org=alice@example.com\u201c. SRS je relevantn\u00fd, napr\u00edklad pri organiz\u00e1cii fungovania zoznamov distrib\u00facie, v ktor\u00fdch sa p\u00f4vodn\u00e1 spr\u00e1va preposiela in\u00fdm pr\u00edjemcom.\n<li class=\"l\"> Stabilizovan\u00e1 vo\u013eba TLS_RESUME, zabezpe\u010duj\u00faca mo\u017enos\u0165 obnovi\u0165 predt\u00fdm preru\u0161en\u00e9 TLS spojenie.\n<li class=\"l\"> Bola stabilizovan\u00e1 podpora vysoko v\u00fdkonn\u00e9ho kompaktn\u00e9ho vlo\u017een\u00e9ho DBMS LMDB, ktor\u00fd uchov\u00e1va d\u00e1ta vo form\u00e1te k\u013e\u00fa\u010d-hodnota. Podporuj\u00fa sa iba lookup-vo\u013eby z pripraven\u00fdch DB pod\u013ea jedn\u00e9ho k\u013e\u00fa\u010da (z\u00e1znam z exim do LMDB nie je implementovan\u00fd). Napr\u00edklad, na overenie dom\u00e9ny odosielate\u013ea v pravidl\u00e1ch je mo\u017en\u00e9 pou\u017ei\u0165 dotaz typu \u201e${lookup{$sender_address_domain}lmdb{\/var\/lib\/spamdb\/stopdomains.mdb}}\u201c.\n<li class=\"l\"> Bola pridan\u00e1 mo\u017enos\u0165 \u201emessage_linelength_limit\u201c na nastavenie obmedzenia po\u010dtu znakov v riadku.\n<li class=\"l\"> Bol poskytnut\u00fd sp\u00f4sob ignorovania cache pri vykon\u00e1van\u00ed lookup dopytov.\n<li class=\"l\"> Pre transport appendfile bola implementovan\u00e1 kontrola kv\u00f3t po\u010das prij\u00edmania spr\u00e1vy (SMTP session).\n<li class=\"l\"> Vo vyh\u013ead\u00e1vac\u00edch dotazoch lookup pre SQLite bola pridan\u00e1 podpora mo\u017enosti &#171;file=&lt;path&gt;&#187;, ktor\u00e1 umo\u017e\u0148uje \u0161pecifikova\u0165 s\u00fabor s datab\u00e1zou pre konkr\u00e9tnu oper\u00e1ciu bez uv\u00e1dzania prefixov v pr\u00edkaze SQL.\n<li class=\"l\"> Vo vyh\u013ead\u00e1vac\u00edch dotazoch lookup pre Lsearch bola pridan\u00e1 podpora mo\u017enosti &#171;ret=full&#187; na vr\u00e1tenie cel\u00e9ho bloku \u00fadajov zodpovedaj\u00faceho k\u013e\u00fa\u010du, nie len prvej riadky.\n<li class=\"l\"> Nastavenie TLS pripojen\u00ed sa ur\u00fdchlilo v\u010faka predbe\u017en\u00e9mu na\u010d\u00edtaniu a cacheovaniu inform\u00e1ci\u00ed (napr\u00edklad certifik\u00e1tov) namiesto ich s\u0165ahovania pred za\u010diatkom spracovania ka\u017ed\u00e9ho pripojenia.\n<li class=\"l\"> Bol pridan\u00fd parameter &#171;proxy_protocol_timeout&#187; na nastavenie \u010dasov\u00e9ho limitu pre protokol Proxy.\n<li class=\"l\"> Bol pridan\u00fd parameter &#171;smtp_backlog_monitor&#187; na povolenie zaznamen\u00e1vania inform\u00e1ci\u00ed o ve\u013ekosti fronty \u010dakaj\u00facich pripojen\u00ed (backlog) do logu.\n<li class=\"l\"> Bol pridan\u00fd parameter &#171;hosts_require_helo&#187;, ktor\u00fd zakazuje odoslanie pr\u00edkazu MAIL, ak predt\u00fdm nebol odoslan\u00fd pr\u00edkaz HELO alebo EHLO.\n<li class=\"l\"> Bol pridan\u00fd parameter &#171;allow_insecure_tainted_data&#187;, pri\u010dom jeho nastaven\u00edm sa nebezpe\u010dn\u00e9 escapovanie \u0161peci\u00e1lnych znakov v \u00fadajoch prevedie na zobrazenie upozornenia namiesto chyby.\n<li class=\"l\"> Podpora platformy macOS bola ukon\u010den\u00e1 (kompilovan\u00e9 s\u00fabory boli presunut\u00e9 do kateg\u00f3rie unsupported).<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55882\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 Exim 4.95, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0432\u043d\u0435\u0441\u0435\u043d\u044b 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