Headers php mail server

Here are some common headers that can be used in a PHP mail script to configure the mail server and improve deliverability:

From Header

From: specifies the sender's email address and name.
Example: From: "John Doe" <[email protected]>

To Header

To: specifies the recipient's email address.
Example: To: [email protected]

Subject Header

Subject: specifies the subject of the email.
Example: Subject: Test Email

Reply-To Header

Reply-To: specifies the email address that should receive replies to the email.
Example: Reply-To: [email protected]

CC Header

CC: specifies the email addresses that should receive a copy of the email.
Example: CC: [email protected], [email protected]

BCC Header

BCC: specifies the email addresses that should receive a blind carbon copy of the email.
Example: BCC: [email protected], [email protected]

MIME Header

MIME-Version: specifies the version of the MIME standard used in the email.
Example: MIME-Version: 1.0
Content-Type: specifies the type of content in the email (e.g. text/plain, text/html, etc.).
Example: Content-Type: text/plain; charset=UTF-8

Authentication Header

Authentication-Results: specifies the authentication results for the email.
Example: Authentication-Results: spf=pass (sender IP is 192.0.2.1) smtp.mailfrom=example.com
DKIM-Signature: specifies the DKIM signature for the email.
Example: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=example.com; s=example; h=From:To:Subject:Date:Message-ID; bh=...; b=...

Other Headers

Date: specifies the date and time the email was sent.
Example: Date: Wed, 12 Jan 2022 14:30:00 +0000
Message-ID: specifies a unique identifier for the email.
Example: Message-ID: <[email protected]>
X-Mailer: specifies the email client or script that sent the email.
Example: X-Mailer: PHPMailer 6.0.5 (https://github.com/PHPMailer/PHPMailer)
X-Priority: specifies the priority of the email (e.g. high, normal, low).
Example: X-Priority: 3

Here is an example of a PHP mail script that uses some of these headers:

<?php
$headers = array(
    'From' => 'John Doe <[email protected]>',
    'To' => '[email protected]',
    'Subject' => 'Test Email',
    'Reply-To' => '[email protected]',
    'MIME-Version' => '1.0',
    'Content-Type' => 'text/plain; charset=UTF-8',
    'Authentication-Results' => 'spf=pass (sender IP is 192.0.2.1) smtp.mailfrom=example.com',
    'DKIM-Signature' => 'v=1; a=rsa-sha256; c=relaxed/relaxed; d=example.com; s=example; h=From:To:Subject:Date:Message-ID; bh=...; b=...',
    'Date' => date('r'),
    'Message-ID' => '<'. uniqid(). '@example.com>',
    'X-Mailer' => 'PHPMailer 6.0.5 (https://github.com/PHPMailer/PHPMailer)',
    'X-Priority' => '3'
);

$mail = mail('[email protected]', 'Test Email', 'This is a test email.', $headers);

if ($mail) {
    echo 'Email sent successfully!';
} else {
    echo 'Error sending email!';
}
?>

Note that the specific headers and values used may vary depending on your email server and the requirements of your email recipients.

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Headers php mail server