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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