actionmailer 3.2.13 requires "mail ~> 2.5.3" breaking compatibility · Issue #9780 · rails/rails · GitHub
SMTP SSL not working without SSL=true · Issue #117 · sameersbn/docker-redmine · GitHub
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SMTP TLS fails to verify certificates with default setting of ' openssl_verify_mode: peer' (#790) · Issues · GitLab.org / charts / GitLab Chart · GitLab
symbols - Ruby Rails: Should I use boolean true or :true? - Stack Overflow
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SMTP does not work · Issue #379 · sameersbn/docker-gitlab · GitHub
ActionMailerでOpenSSL::SSL::SSLErrorが発生してメールが送れない - 行動すれば次の現実
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bitnami-gitlab-8.5.7-0-linux-x64-installer.run部署gitlab_helloclei的博客-CSDN博客_bitnami gitlab
Configuring reseller's mail server — ActivePlatform. Operator Control Panel
Undocumented ActionMailer openssl_verify_mode option · Issue #892 · rails/rails · GitHub
OpenSSL::SSL::SSLError (v 1.1.1d) unsupported protocol in rails application · Issue #11018 · openssl/openssl · GitHub
Sending Emails in Ruby with Mail (SMTP) | by Derek Chen | Derek's Blog | Medium
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Redmine】邮件触发以及附件图片预览，配置摘要_cuibao0922的博客-CSDN博客
