Can we send mail from localhost in php ubuntu

A classic question!

By default, PHP's mail() function uses the system's default mail server to send emails. On Ubuntu, this is usually configured to use a local mail server, such as sendmail or postfix.

To send mail from a PHP script running on your local machine (localhost), you'll need to configure your system to allow PHP to send emails. Here are the general steps:

Option 1: Using sendmail

Install sendmail if you haven't already: sudo apt-get install sendmail
Configure PHP to use sendmail as the mail transport agent (MTA): Edit the /etc/php5/apache2/php.ini file (or the equivalent for your PHP version) and add the following lines:
```
[mail function]
; For Win32 only.
SMTP = localhost
smtp_port = 25
```
Restart your Apache server: sudo service apache2 restart

Option 2: Using postfix

Install postfix if you haven't already: sudo apt-get install postfix
Configure PHP to use postfix as the MTA: Edit the /etc/php5/apache2/php.ini file (or the equivalent for your PHP version) and add the following lines:
```
[mail function]
; For Win32 only.
SMTP = localhost
smtp_port = 25
```
Restart your Apache server: sudo service apache2 restart

Testing the setup

Create a simple PHP script to test the mail sending:

<?php
mail('[email protected]', 'Test Subject', 'This is a test email');
?>

Run the script and check your email client for the received email.

Additional tips

Make sure your PHP script has the necessary permissions to write to the mail queue (usually /var/spool/postfix or /var/spool/sendmail).
If you're using a firewall, ensure that port 25 (SMTP) is open.
You can also use a third-party mail library like SwiftMailer or PHPMailer to send emails from your PHP script.

Mail Knowledge

Can we send mail from localhost in php ubuntu