How to have my PHP Send mail?

As already noted, postfix would be an overkill if you just need to send emails from php while developing applications on your home computer.

I personally use very simple and lightweight package ssmtp. It will use any smtp server to send outbound emails. Install it by running:

sudo apt-get install ssmtp

Then edit /etc/ssmtp/ssmtp.conf file, comment out existing mailhub line and add the following lines (this example is for gmail smtp server):

mailhub=smtp.gmail.com:587
UseSTARTTLS=YES
AuthUser=<YOUR-EMAIL>@gmail.com
AuthPass=<YOUR-PASSWORD>

(Provide your gmail username & password. Of course you can use any other SMTP server).

Now make sure that your php.ini has correct sendmail_path. It should read as:

sendmail_path = /usr/sbin/sendmail -t

(From comments of @dima-l and @omar-sabic: You do not have to specify ssmtp here because the installation should have created a symlink for /usr/sbin/sendmail, which correctly points to ssmtp. Otherwise you have to specify sendmail_path = /usr/sbin/ssmtp -t)

Reload apache and your php should be able to send outgoing emails now.


From the mail manual of php:

Requirements

For the mail functions to be available, PHP requires an installed and working email system. The program to be used is defined by the configuration settings in the php.ini file.

This means you have to install some sort of mailserver and configure php to use it. Usually this mailserver is postfix in Ubuntu. However - if the php side you are coding will eventually be stored on a hosting service's side (e.g. xmission), a mail server will most likely already be installed there. In that case just test your site online instead of locally.

If you need to test it on your own system or mean to host it on your own home-server than proceed with:

Postfix Installation

Installation: postfix Install postfix / sudo apt-get install postfix During the process you will be asked in which mode you want postfix installed. There are four possible modes:

  • Internet: Your own mail-server.
  • Satellite: An extern mail provider (e.g. Google) will be used for sending and receiving mail. The server will not receive any mail.
  • Smarthost: Mixture between the two. Mail is stored locally but sent through an external mail provider.
  • Local only: Will not concern you. That's a system intern mailserver. You can only send mail from user to user on the system.

The rest of the install options depend on your choice of this general configuration.

Most likely you will choose a satellite install. That means mail will be sent using an extern provider. As smtp-server (outgoing mail server) you will then have to specify your providers smtp. The rest of the options is self explanatory.

Post Installation Configuration

Most smtp-servers require a password authentication to send mail. So postfix will need to know that password. Also there are things like encryption to consider (which you'll have to google). This is how you configure postfix using password authentication (sasl):

  • Install libsasl2-modules Install libsasl2-modules and sasl2-bin Install sasl2-bin by clicking the Software Center icons or from terminal using:

    sudo apt-get install libsasl2-2 libsasl2-modules sasl2-bin

  • Enable sasl-auth by adding these lines to /etc/postfix/main.cf

     # add to /etc/postfix/main.cf
 smtp_sasl_auth_enable = yes
 smtp_sasl_security_options = noplaintext noanonymous
 smtp_sasl_password_maps = hash:/etc/postfix/sasl_password

  • Create a file /etc/postfix/sasl_password with a line like:

     smtp.gmail.com [email protected]:USERPASSWORD

    Substitute the actual password, username and smtp-address.

  • Update postfix:

     sudo chmod 600 /etc/postfix/sasl_password # for safety of your smtp password
 sudo postmap hash:/etc/postfix/sasl_password 
 sudo postmap /etc/postfix/sender_canonical
 sudo /etc/init.d/postfix restart

    You might have to circumvent the 'permission denied' bug by chown postfix:postfix /etc/postfix beforehand.

This should do it in most of the cases. Yet some smtp providers require a specific address as the sender or encryption.

Related: PEAR::Mail interface might also be of interest to you.

Gmail (and perhaps other services) may not like it that you are attempting to send mail this way as it could be deemed insecure by their standards, and would block your attempt i.e. nothing will happen on the screen or someplace of the whole process would block your authentication. Also your POP3 must be enabled.

To counter that see here. (If you want to be on the safe side, then create a dummy Gmail account)


PHP requires an SMTP client to send mail. You could install a full-featured mail transfer agent (MTA) like Postfix to serve this function, but it's overkill if you only need to send mail through PHP. Instead, install msmtp. It's lightweight and much simpler to configure.

Install msmtp

sudo apt-get install msmtp-mta ca-certificates

Configure it

Create a new configuration file:

sudo vi /etc/msmtprc

...with the following configuration information:

# Set defaults.
defaults

# Enable or disable TLS/SSL encryption.
tls on
tls_starttls on
tls_trust_file /etc/ssl/certs/ca-certificates.crt

# Set up a default account's settings.
account default
host <smtp.example.net>
port 587
auth on
user <[email protected]>
password <password>
from <[email protected]>
syslog LOG_MAIL

You need to replace the configuration data represented by everything within "<" and ">" (inclusive, remove these). For host/username/password, use your normal credentials for sending mail through your mail provider.

Tell PHP to use it

sudo vi /etc/php5/apache2/php.ini

Add this single line:

sendmail_path = /usr/bin/msmtp -t

Tags:

Php

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