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translating---geekpi
Sending Email via PHP in CentOS 7 using Sendmail
============================================================
![sendmail logo](http://fasterland.net/wp-content/uploads/2017/02/sendmail-logo-750x450.png)
If you are running a **web server** or a **VPS**, you may encounter the need of sending emails using your **PHP** application.
In the same way, if you are running a **WordPress** blog or you are using any kind of **CMS** and you would allow your visitors to send you emails using a Contact form (for example using the **[Contact Form 7][3]** plugin for **WordPress**) you may need to install a simple program into your web server called **[sendmail][4]**.
> «Sendmail is a general purpose internetwork email routing facility that supports many kinds of mail-transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.» [via Wikipedia][5].
**Sendmail** can be simply installed using the package manager of your distribution.
Here are the instructions for installing **Sendmail** on **CentOS 7**.
### Installation
In order to install **sendmail** on your **CentOS 7** server, run the following command:
```
# yum install sendmail
```
### Allowing your server to send emails
If you are using **SELinux** on your **CentOS 7** server, you have to allow **sendmail** to send emails using the following command:
```
# setsebool -P httpd_can_sendmail=on
```
### Send a test email using PHP
Enter the php interactive shell using this command:
```
php -a
```
In the interactive shell, paste the following line of code:
```
mail ('user@receiver.com', "Test email", "Test email from the Internet", null, "-f user@sender.com");
```
Don’t forget to replace **user@receiver.com** with the receiver email address and **user@sender.com** with the sender email address.
### Viewing the sendmail log
In order to monitor the mail log, you can use this command:
```
tail /var/log/maillog
```
Once **sendmail** is installed on your web server you can allow your users to contact you via email using a contact form. 
--------------------------------------------------------------------------------
via: http://fasterland.net/sending-email-via-php-centos-7-using-sendmail.html
作者：[Francesco Mondello][a]
译者：[译者ID](https://github.com/译者ID)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://fasterland.net/
[1]:http://fasterland.net/author/faster3ck
[2]:http://fasterland.net/
[3]:https://wordpress.org/plugins/contact-form-7/
[4]:http://www.sendmail.com/sm/open_source/
[5]:https://en.wikipedia.org/wiki/Sendmail
[6]:http://fasterland.net/category/server-admin

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在 CentOS 7 中使用 Sendmail 通过 PHP 发送邮件
============================================================
![sendmail logo](http://fasterland.net/wp-content/uploads/2017/02/sendmail-logo-750x450.png)
如果你运行了一个** web 服务器** 或者一台** VPS **，你可能需要在你的** PHP ** 程序中发送邮件。
同样，如果你正在运行一个** WordPress **博客，或者你正在使用任何类型的** CMS **，你允许你的访问者通过联系栏向你发送电子邮件（例如使用** WordPress **的 **[ Contact Form 7][3]**插件**），你可能需要安装一个名为 **[sendmail][4]** 的程序到你的 web 服务器上。
>«Sendmail 是一个通用的互联网电子邮件路由工具，支持多种邮件传输和传递方法，包括用于通过 Internet 进行电子邮件传输的简单邮件传输协议（SMTP）。»[来自 Wikipedia][5]。
** Sendmail **可以通过你的发行版的软件包管理器安装。
以下是在** CentOS 7 **上安装** Sendmail **的说明。
### 安装
要在 **CentOS 7** 中安装 **CentOS 7** ，运行下面的命令：
```
# yum install sendmail
```
### 允许服务器可以发送邮件
如果在 **CentOS 7** 中使用了 **SELinux**， 你需要使用下面的命令允许 **sendmail** 发送邮件：
```
# setsebool -P httpd_can_sendmail=on
```
### 使用 PHP 发送一封测试邮件
使用这个命令进入 php 交互 shell 中：
```
php -a
```
在交互 shell 中，粘贴下面的代码：
```
mail ('user@receiver.com', "Test email", "Test email from the Internet", null, "-f user@sender.com");
```
不要忘记将 **user@receiver.com** 和 **user@sender.com** 分别替换为收件地址和发件地址。
### 浏览 sendmail 日志
要监控邮件日志，你可以使用这个命令：
```
tail /var/log/maillog
```
在服务器上安装 **sendmail** 完成后，你可以允许你的用户通过联系栏通过邮件联系你了。
--------------------------------------------------------------------------------
via: http://fasterland.net/sending-email-via-php-centos-7-using-sendmail.html
作者：[Francesco Mondello][a]
译者：[geekpi](https://github.com/geekpi)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://fasterland.net/
[1]:http://fasterland.net/author/faster3ck
[2]:http://fasterland.net/
[3]:https://wordpress.org/plugins/contact-form-7/
[4]:http://www.sendmail.com/sm/open_source/
[5]:https://en.wikipedia.org/wiki/Sendmail
[6]:http://fasterland.net/category/server-admin