How to Use Gmail or Yahoo with PHP mail() Function

Introduction

 

PHP mail() function is used to create and send emails. The function accepts a number of parameters for assigning the actual values to the various fields of email. The sendmail_path configuration directive has programs which will be used to send emails.

Most of the Linux distributions will have sendmail pre-installed. But the set up of SPF/PTR records, generation of DKIM keys and changes to php script for ensuring mails sent are not flagged as spam can be quite overwhelming.

MSMTP, which is an SMTP client is used to send emails using SMTP servers. This can be used by PHP mail() function instead of sendmail.

 

Installation of MSMTP

 

Here, in this tutorial we will be installing MSMTP on Fedora Linux using the yum command:

yum install msmtp

Since the repository do not have RPM package for MSMTP, we will have to install it from the source:

yum install make gcc pkgconfig
wget http://sourceforge.net/projects/msmtp/files/msmtp/1.4.31/msmtp-1.4.31.tar.bz2/download
tar -xvf msmtp-1.4.31.tar.bz2
cd msmtp-1.4.31./
configure
make
make install

If you want the latest version, check the official page for updates. Here I have used version 1.4.31.

If you are using Ubuntu/Debian distributions, use apt-get to install:

apt-get install msmtp

Arch Linux users can use pacman installer as shown below:

sudo pacman -S msmtp

 

Configuration of MSMTP

 

~/.msmtprc will store the configuration file of MSMTP for every user. The system wide configuration file is /etc/msmtprc.

Open up the configuration file in your directory:

vi ~/.msmtprc

Use the following lines of code for required accounts:

For Yahoo account:

account yahoo
tls on
tls_start
tls off
tls_certcheck off
auth on
host smtp.mail.yahoo.com
user user1
from [email protected]
password yourYahooPassword

 

For Gmail account:

account gmail
tls on
tls_certcheck off
auth on
host smtp.gmail.comport 587
user [email protected]
from [email protected]
password yourgmailPassword

Since the file may have more than one account, make sure that the account value is unique for each account.

Save the file and make it readable only by the owner. Msmtp will not run if the permissions on it are above 600.

chmod 600 ~/.msmtprc

To verify it, check if it is working properly from command line. For that, create a new file containing a simple email format.

echo -e "From: Name1<[email protected]> \n\
To: name2<[email protected]> \n\
Subject: Hello World \n\
\n\
This email was sent using MSMTP via Gmail/Yahoo." >> sample_email.txt

Send the email:
 

cat sample_email.txt | msmtp --debug -a gmail [email protected]

Replace the given names with your actual values. You will be able to see a lot of messages since we used the ‘–debug’ parameter.

Copy the file to /etc directory:

cp -p ~/.msmtprc /etc/.msmtp_php

You have to change the ownership to the username under which the server will be running. It can be either ‘apache’ or ‘www-data’ or ‘nobody’ depending on the Linux distribution.

chown www-data:www-data /etc/.msmtp_php

 

Configuration of PHP

 

Open up the php.ini file:

vi /etc/php5/php.ini

Search for the ‘sendmai_path’ and update it by adding msmtp:

sendmail_path = "/usr/bin/msmtp -C /etc/.msmtp_php --logfile /var/log/msmtp.log -a gmail -t"

Create a log file and change the ownership to username under which server is running:

touch /var/log/msmtp.log
chown www-data:www-data /var/log/msmtp.log

Restart your web server:

service httpd restart

For Arch Linux, use systemctl command:

systemctl restart httpd

Restart PHP-fpm:

service php5-fpm restart

Create a php script with mail() function to test the set up:

<?php
if(mail("[email protected]","A Subject Here","Hi there,\nThis email was sent using PHP's mail function."))
print "Email successfully sent";
else
print "An error occured";
?>

Access this file from the web browser by pointing to:

http://www.example.com/file.php

You can check the msmtp log file if the email was not sent successfully:

tail /var/log/msmtp.log

 

Troubleshooting

 

If the email was not sent successfully:

  • Check the php.ini file to make sure you have done the correct set up. It can be confirmed by creating phpinfo(); file and checking ‘loaded configuration file’ section.
  • MSMTP configuration file path may be given wrong.
  • Web server may not have proper permission to read the file.
  • Check whether email is sent from command line by running the php script.
    php /var/www/html/file.php

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