https://blog.csdn.net/u010856284/article/details/83650364
gitlab 11.4以后的添加stmp根据官网出现了配置，导致不能测试通过，以下是我的配置文件，并且完成了测试，可以粘贴使用：
gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.qq.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "2532264976@qq.com"
gitlab_rails['smtp_password'] = "djyeajzanhltdigh"
gitlab_rails['smtp_domain'] = "qq.com"
gitlab_rails['smtp_authentication'] = :login
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = true
gitlab_rails['gitlab_email_from'] = '2532264976@qq.com'
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原文链接：https://blog.csdn.net/u010856284/article/details/83650364
Notify.test_email("sss@test.com","title","gitlab").deliver_now