send email in codeigniter 4 without smtp server in php

To send an email in CodeIgniter 4 without using an SMTP server, you can make use of the built-in Email library and send emails using the mail() function in PHP.

First, make sure you have properly configured your email settings in the config/Email.php file. Here's an example configuration:

main.php
$SMTPHost = 'localhost';
$SMTPPort = '25';
$SMTPUser = 'your_username';
$SMTPPass = 'your_password';
$mailType = 'html';
$charset = 'UTF-8';
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Now, you can send an email using the following steps:

1. Load the Email library in your controller or model:

main.php
$email = \Config\Services::email();
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2. Set the necessary email parameters:

main.php
$email->setFrom('your_email@example.com', 'Your Name');
$email->setTo('recipient@example.com');
$email->setSubject('Email Subject');
$email->setMessage('Email Message');
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3. Send the email using the send() method:

main.php
if ($email->send()) {
    echo 'Email sent successfully.';
} else {
    $error = $email->printDebugger(['headers']);
    echo $error;
}
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That's it! You have successfully sent an email without using an SMTP server in CodeIgniter 4.

It's important to note that sending email directly from your server without an SMTP server might lead to email delivery issues, as many email providers consider non-SMTP emails as spam. It's recommended to use a proper SMTP server for reliable email delivery.