{"id":3168,"date":"2020-05-25T09:53:18","date_gmt":"2020-05-25T04:23:18","guid":{"rendered":"https:\/\/www.24x7serversupport.com\/blog\/?p=3168"},"modified":"2023-01-28T11:54:57","modified_gmt":"2023-01-28T06:24:57","slug":"unable-to-send-mail-using-postfix-starttls-authentication-4-7-0-tls-not-available-due-to-local-problem","status":"publish","type":"post","link":"https:\/\/www.24x7serversupport.com\/blog\/unable-to-send-mail-using-postfix-starttls-authentication-4-7-0-tls-not-available-due-to-local-problem\/","title":{"rendered":"Unable to send mail using postfix STARTTLS authentication: 4.7.0 TLS not available due to local problem"},"content":{"rendered":"\n<p>Unable to send an email using the STARTTLS authentication:<\/p>\n\n\n\n<p>454 4.7.0 TLS not available due to local problem<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cause<\/h2>\n\n\n\n<p>TLS misconfiguration in Postfix:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <code>postfix_default.pem<\/code> certificate file does not contain the valid SSL certificate or it is broken.<\/li>\n\n\n\n<li>The path to the certificate is incorrect in the <code>\/etc\/postfix\/main.cf<\/code> file.<\/li>\n\n\n\n<li>TLS configuration parameters are missing in the <code>\/etc\/postfix\/main.cf<\/code> file.<\/li>\n<\/ul>\n\n\n\n<p>Connect to the server via SSH.<\/p>\n\n\n\n<p>Create the <code>\/etc\/postfix\/tls<\/code> directory, set correct ownership, group, permissions and create a certificate file:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">mkdir \/etc\/postfix\/tls<br># chown root:postfix \/etc\/postfix\/tls<br># chmod u=rwx,go= \/etc\/postfix\/tls<br># cd \/etc\/postfix\/tls<br># openssl req -new -x509 -nodes -out smtpd.pem -keyout smtpd.pem -days 3650<\/pre>\n\n\n\n<p>Change <code>\/etc\/postfix\/main.cf<\/code> accordingly:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">smtpd_tls_CAfile = \/etc\/postfix\/tls\/smtpd.pem<br>smtpd_tls_cert_file = \/etc\/postfix\/tls\/smtpd.pem<br>smtpd_tls_key_file = \/etc\/postfix\/tls\/smtpd.pem<br>smtpd_tls_session_cache_database = btree:${queue_directory}\/smtpd_scache<br>smtpd_tls_security_level = may<br>smtpd_use_tls = yes<br>smtp_tls_security_level = may<br>smtp_tls_CAfile = \/etc\/postfix\/tls\/smtpd.pem<br>smtp_tls_cert_file = \/etc\/postfix\/tls\/smtpd.pem<br>smtp_tls_key_file = \/etc\/postfix\/tls\/smtpd.pem<br>smtp_tls_session_cache_database = btree:${queue_directory}\/smtp_scache<br>smtp_use_tls = yes<br>smtpd_tls_received_header = yes<br>smtpd_tls_ask_ccert = yes<br>smtpd_tls_loglevel = 1<br>tls_random_source = dev:\/dev\/urandom<\/pre>\n\n\n\n<p>If the <code>smtpd_sasl_auth_enable = yes<\/code> option is set in the <code>\/etc\/postfix\/main.cf<\/code> file, make sure that the <code>saslauthd<\/code> service is started:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">service saslauthd status<\/pre>\n\n\n\n<p>Reload Postfix configuration: service postfix restart<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Unable to send an email using the STARTTLS authentication: 454 4.7.0 TLS not available due to local problem Cause TLS misconfiguration in Postfix: Connect to the server via SSH. Create the \/etc\/postfix\/tls directory, set correct ownership, group, permissions and create a certificate file: mkdir \/etc\/postfix\/tls# chown root:postfix \/etc\/postfix\/tls# chmod u=rwx,go= \/etc\/postfix\/tls# cd \/etc\/postfix\/tls# openssl req [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3592,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[92],"tags":[93,289],"class_list":["post-3168","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-postfix","tag-postfix","tag-tls"],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Unable to send mail using postfix STARTTLS authentication: 4.7.0 TLS not available due to local problem | 24x7serversupport Blog<\/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:\/\/www.24x7serversupport.com\/blog\/unable-to-send-mail-using-postfix-starttls-authentication-4-7-0-tls-not-available-due-to-local-problem\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Unable to send mail using postfix STARTTLS authentication: 4.7.0 TLS not available due to local problem | 24x7serversupport Blog\" \/>\n<meta property=\"og:description\" content=\"Unable to send an email using the STARTTLS authentication: 454 4.7.0 TLS not available due to local problem Cause TLS misconfiguration in Postfix: Connect to the server via SSH. Create the \/etc\/postfix\/tls directory, set correct ownership, group, permissions and create a certificate file: mkdir \/etc\/postfix\/tls# chown root:postfix \/etc\/postfix\/tls# chmod u=rwx,go= \/etc\/postfix\/tls# cd \/etc\/postfix\/tls# openssl req [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.24x7serversupport.com\/blog\/unable-to-send-mail-using-postfix-starttls-authentication-4-7-0-tls-not-available-due-to-local-problem\/\" \/>\n<meta property=\"og:site_name\" content=\"24x7serversupport Blog\" \/>\n<meta property=\"article:published_time\" content=\"2020-05-25T04:23:18+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-01-28T06:24:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.24x7serversupport.com\/blog\/wp-content\/uploads\/2020\/05\/Unable-to-send-mail-using-postfix-STARTTLS-authentication-4.7.0-TLS-not-available-due-to-local-problem.png\" \/>\n\t<meta property=\"og:image:width\" content=\"275\" \/>\n\t<meta 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