{"id":497,"date":"2020-04-05T17:55:00","date_gmt":"2020-04-05T08:55:00","guid":{"rendered":"https:\/\/www.skyer9.pe.kr\/wordpress\/?p=497"},"modified":"2025-08-20T18:33:55","modified_gmt":"2025-08-20T09:33:55","slug":"sendmail-with-ssl","status":"publish","type":"post","link":"https:\/\/www.skyer9.pe.kr\/wordpress\/?p=497","title":{"rendered":"sendmail (3\/4) &#8211; sendmail with SSL"},"content":{"rendered":"<h1>sendmail (3\/4) &#8211; sendmail with SSL<\/h1>\n<h2>\uc778\uc99d\uc11c \ub4f1\ub85d<\/h2>\n<p>\uba3c\uc800 <a href=\"\/wordpress\/?p=311\">\uc5ec\uae30<\/a> \ub97c \ucc38\uc870\ud558\uc5ec SSL \uc744 \uc124\uce58\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<pre><code class=\"language-bash\">sudo vi \/etc\/hostname\n\nskyer9.pe.kr<\/code><\/pre>\n<pre><code class=\"language-bash\">sudo reboot<\/code><\/pre>\n<p>\uc778\uc99d\uc11c\uac00 \uac31\uc2e0\ub418\ub294 \uacbd\uc6b0\ub97c \ub300\ube44\ud574 \ud06c\ub860\ud0ed\ub4f1\uc5d0 \uc778\uc99d\uc11c\ub97c \ub2e4\uc2dc \ubcf5\uc0ac\ud574 \uc624\ub294 \ub85c\uc9c1\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n<pre><code class=\"language-bash\">sudo mkdir \/etc\/cert_sendmail\nsudo cp \/etc\/letsencrypt\/live\/skyer9.pe.kr\/* \/etc\/cert_sendmail\/\n\nsudo chown root:smmsp \/etc\/cert_sendmail\/*.pem\nsudo chmod 640 \/etc\/cert_sendmail\/*.pem\n\nsudo chown root:smmsp \/etc\/cert_sendmail\nsudo chmod 750 \/etc\/cert_sendmail<\/code><\/pre>\n<pre><code class=\"language-bash\">sudo vi \/etc\/mail\/sendmail.mc\n\ndefine(`CERT_DIR&#039;, `\/etc\/cert_sendmail&#039;)dnl\ndefine(`confCACERT_PATH&#039;, `\/etc\/cert_sendmail&#039;)dnl\ndefine(`confCACERT&#039;,      `CERT_DIR\/chain.pem&#039;)dnl\ndefine(`confSERVER_CERT&#039;, `CERT_DIR\/cert.pem&#039;)dnl\ndefine(`confSERVER_KEY&#039;,  `CERT_DIR\/privkey.pem&#039;)dnl\ndefine(`confCLIENT_CERT&#039;, `CERT_DIR\/cert.pem&#039;)dnl\ndefine(`confCLIENT_KEY&#039;,  `CERT_DIR\/privkey.pem&#039;)dnl<\/code><\/pre>\n<pre><code class=\"language-bash\">sudo vi \/etc\/mail\/sendmail.mc\n\ninclude(`\/etc\/mail\/tls\/starttls.m4&#039;)dnl\n# below the following\ninclude(`\/usr\/share\/sendmail\/cf\/m4\/cf.m4&#039;)dnl<\/code><\/pre>\n<pre><code class=\"language-bash\">sudo vi \/etc\/mail\/submit.mc\n\ninclude(`\/etc\/mail\/tls\/starttls.m4&#039;)dnl\n# below the following\ninclude(`\/usr\/share\/sendmail\/cf\/m4\/cf.m4&#039;)dnl<\/code><\/pre>\n<pre><code class=\"language-bash\">sudo make -C \/etc\/mail\nsudo systemctl restart sendmail\nsudo systemctl status sendmail<\/code><\/pre>\n<p>\uc778\uc99d\uc11c \uacbd\ub85c\ub97c \ubcc0\uacbd\ud588\uc74c\uc5d0\ub3c4 \ubcc0\uacbd\uc774 \ub418\uc9c0 \uc54a\ub294 \uacbd\uc6b0 \uc544\ub798 \ub450\uac1c\uc758 \ud30c\uc77c\uc744 \uc9c1\uc811\uc218\uc815\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<p>\/etc\/mail\/tls\/starttls.m4<br \/>\n\/etc\/mail\/submit.cf<\/p>\n<h2>SASL \uc778\uc99d \uc124\uc815<\/h2>\n<pre><code class=\"language-bash\">sudo apt update\nsudo apt install sasl2-bin libsasl2-modules\n\nsudo systemctl start saslauthd\nsudo systemctl enable saslauthd<\/code><\/pre>\n<pre><code class=\"language-bash\">sudo vi \/etc\/default\/saslauthd\n\nSTART=yes\n\nsudo systemctl reload saslauthd<\/code><\/pre>\n<pre><code class=\"language-bash\">sudo sendmailconfig<\/code><\/pre>\n<h2>TLS \ud65c\uc131\ud654<\/h2>\n<p>\uc544\ub798 \uc124\uc815\uc744 \ucd94\uac00\ud558\uba74, TLS \uac00 \ud65c\uc131\ud654\ub418\uc5b4 \uc774\uba54\uc77c\uc774 \ubc1c\uc1a1\ub429\ub2c8\ub2e4.<\/p>\n<pre><code class=\"language-bash\">vi ~\/.mutt\/muttrc\n\nset from=&quot;ubuntu@skyer9.pe.kr&quot;\nset realname=&quot;ubuntu&quot;\nset hostname=skyer9.pe.kr\nset ssl_starttls=yes<\/code><\/pre>\n<h2>\ubc1c\uc1a1 \ud14c\uc2a4\ud2b8<\/h2>\n<pre><code class=\"language-bash\">echo &quot;\uba54\uc77c \uc11c\ubc84 \uc124\uc815 \ud14c\uc2a4\ud2b8\n\n\uc548\ub155\ud558\uc138\uc694,\n\n\uc774 \uba54\uc77c\uc740 \uba54\uc77c \uc11c\ubc84\uc758 \ubcf4\uc548 \uc124\uc815\uc774 \uc62c\ubc14\ub974\uac8c \uad6c\uc131\ub418\uc5c8\ub294\uc9c0 \ud655\uc778\ud558\uae30 \uc704\ud55c \ud14c\uc2a4\ud2b8 \uba54\uc77c\uc785\ub2c8\ub2e4.\n\n\ud604\uc7ac \ud65c\uc131\ud654\ub41c \ubcf4\uc548 \uc124\uc815:\n- DKIM (DomainKeys Identified Mail): \ud65c\uc131\ud654\n- SPF (Sender Policy Framework): \ud65c\uc131\ud654  \n- DMARC (Domain-based Message Authentication): \ud65c\uc131\ud654\n- TLS (Transport Layer Security): \ud65c\uc131\ud654\n\n\ud14c\uc2a4\ud2b8 \ud56d\ubaa9:\n1. \uba54\uc77c \uc804\uc1a1 \uc131\uacf5 \uc5ec\ubd80\n2. \uc2a4\ud338 \ud544\ud130 \ud1b5\uacfc \uc5ec\ubd80\n3. DKIM \uc11c\uba85 \uac80\uc99d\n4. SPF \ub808\ucf54\ub4dc \uac80\uc99d\n5. DMARC \uc815\ucc45 \uc900\uc218\n\n\uc774 \uba54\uc77c\uc774 \uc815\uc0c1\uc801\uc73c\ub85c \uc218\uc2e0\ub418\uc5c8\ub2e4\uba74 \uba54\uc77c \uc11c\ubc84 \uc124\uc815\uc774 \uc62c\ubc14\ub974\uac8c \uad6c\uc131\ub41c \uac83\uc785\ub2c8\ub2e4.\n\n\ubc1c\uc1a1 \uc2dc\uac01: $(date &#039;+%Y-%m-%d %H:%M:%S&#039;)\n\uc11c\ubc84: $(hostname)\n\n\uac10\uc0ac\ud569\ub2c8\ub2e4.&quot; | mutt -s &quot;[\ud14c\uc2a4\ud2b8] \uba54\uc77c \uc11c\ubc84 \ubcf4\uc548 \uc124\uc815 \uac80\uc99d&quot; skyer9@gmail.com<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>sendmail (3\/4) &#8211; sendmail with SSL \uc778\uc99d\uc11c \ub4f1\ub85d \uba3c\uc800 \uc5ec\uae30 \ub97c \ucc38\uc870\ud558\uc5ec SSL \uc744 \uc124\uce58\ud574\uc57c \ud569\ub2c8\ub2e4. sudo vi \/etc\/hostname skyer9.pe.kr sudo reboot \uc778\uc99d\uc11c\uac00 \uac31\uc2e0\ub418\ub294 \uacbd\uc6b0\ub97c \ub300\ube44\ud574 \ud06c\ub860\ud0ed\ub4f1\uc5d0 \uc778\uc99d\uc11c\ub97c \ub2e4\uc2dc \ubcf5\uc0ac\ud574 \uc624\ub294 \ub85c\uc9c1\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. sudo mkdir \/etc\/cert_sendmail sudo cp \/etc\/letsencrypt\/live\/skyer9.pe.kr\/* \/etc\/cert_sendmail\/ sudo chown root:smmsp \/etc\/cert_sendmail\/*.pem sudo chmod 640 \/etc\/cert_sendmail\/*.pem sudo chown root:smmsp \/etc\/cert_sendmail sudo chmod 750\u2026 <span class=\"read-more\"><a href=\"https:\/\/www.skyer9.pe.kr\/wordpress\/?p=497\">Read More &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-497","post","type-post","status-publish","format-standard","hentry","category-sendmail"],"_links":{"self":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=497"}],"version-history":[{"count":16,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/497\/revisions"}],"predecessor-version":[{"id":10719,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/497\/revisions\/10719"}],"wp:attachment":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}