vi /etc/gitlab/gilab.rb
gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.gmail.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "cloud.jung@gmail.com"
gitlab_rails['smtp_password'] = "####"
gitlab_rails['smtp_domain'] = "smtp.gmail.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'
> ActionMailer::Base.delivery_method // 전송모드 확인(:smtp|:sendmail)
> ActionMailer::Base.smtp_settings // smtp 설정 확인
> Nofify.test_main('cloud.jung@gmail.com', 'Mail subject', 'Mail body').deliver_now