# ngx\_mail\_smtp\_module

* [示例配置](/nginx-docs/he-xin-gong-neng/mail/ngx_mail_smtp_module.md#example_configuration)
* [指令](/nginx-docs/he-xin-gong-neng/mail/ngx_mail_smtp_module.md#directives)
  * [ngx\_mail\_smtp\_module](/nginx-docs/he-xin-gong-neng/mail/ngx_mail_smtp_module.md#ngx_mail_smtp_module)
  * [smtp\_capabilities](/nginx-docs/he-xin-gong-neng/mail/ngx_mail_smtp_module.md#smtp_capabilities)

## 指令 <a href="#directives" id="directives"></a>

### smtp\_auth

|       - | 说明                           |
| ------: | ---------------------------- |
|  **语法** | **smtp\_auth** `method ...`; |
|  **默认** | smtp\_auth login plain;      |
| **上下文** | mail、server                  |

为 SMTP 客户端设置 [SASL 认证](https://tools.ietf.org/html/rfc2554) 的允许方法。支持的方法有：

* `login`

  [AUTH LOGIN](https://tools.ietf.org/html/draft-murchison-sasl-login-00)
* `plain`

  [AUTH PLAIN](https://tools.ietf.org/html/rfc4616)
* `cram-md5`

  [AUTH CRAM-MD5](https://tools.ietf.org/html/rfc2195)。为了使此方法正常工作，密码不加密存储。
* `external`

  [AUTH EXTERNAL](https://tools.ietf.org/html/rfc4422)（1.11.6）。
* `none`

  不需要验证

### smtp\_capabilities

|       - | 说明                                      |
| ------: | --------------------------------------- |
|  **语法** | **smtp\_capabilities** `extension ...`; |
|  **默认** | ——                                      |
| **上下文** | mail、server                             |

设置传送给客户端响应 `EHLO` 命令的 SMTP 协议扩展列表。根据 [starttls](/nginx-docs/he-xin-gong-neng/mail/ngx_mail_ssl_module.md#starttls) 指令值，[smtp\_auth](/nginx-docs/he-xin-gong-neng/mail/ngx_mail_smtp_module.md#smtp_auth) 指令和 [STARTTLS](https://tools.ietf.org/html/rfc3207) 中指定的认证方法将自动添加到此列表中。

指定被代理客户端的 MTA 支持扩展是有意义的（当 nginx 透明地将客户端连接代理到后端，如果这些扩展与认证后使用的命令相关）。

目前的标准扩展名单已发布在 [www.iana.org](http://www.iana.org/assignments/mail-parameters)。

## 原文档

<http://nginx.org/en/docs/mail/ngx_mail_smtp_module.html>


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