They can be an array where the key is a header name and the value is a header value. The additional headers indicate other recipients or copies of your message like CC or BCC. “” = the mandatory one is the “from” header: it must be specified, otherwise, you will receive an error message like Warning: mail(): “sendmail_from” not set in php.ini or custom “From:” header missing.Each line should not exceed 70 characters. Lines should be separated with a CRLF (\r\n). ![]() “$message” = the body of your message.In general, it needs to comply with RFC 2822. If you are still committed to the PHP built-in mail function() and are ready to accept the challenge, let’s take a look at the basic PHP script syntax and its main parameters. Moreover, you won’t receive bounce back messages if there is a delivery failure. Thus, the overall deliverability of email messages sent via PHP mail () is not guaranteed. The messages dispatched will not benefit from the SPF and DKIM setup on your domain, therefore, the messages will likely be treated as spam by the receiving MTA (Mail Transfer Agent). Keep in mind that when you send emails with mail(), you may come across some grave deliverability issues. add additional parameters to the `sendmail` command.include additional headers to the message.create simple HTML/text messages without attachments and images.Here’s what you can do with PHP built-in mail function(): Mail() is a wrapper on top of the sendmail utility, so sendmail has to be installed in the system first. While the mail() function can be a simple and lightweight option for sending emails in some cases, it is not recommended for production use and is generally considered less robust than other email sending options available in PHP. – Security concerns: The mail() function can be vulnerable to email injection attacks, where an attacker can inject additional headers into the email message, potentially compromising the security of the email system. This can limit the functionality of your email sending application. – Lack of features: The mail() function does not support many advanced features such as SMTP authentication, email tracking, and attachments. This can cause deliverability issues and make it difficult to ensure that emails are being delivered to recipients. – Deliverability issues: The mail() function relies on the local mail server configuration, which can result in emails being flagged as spam or rejected by some email providers. ![]() Here are some reasons why mail() is not commonly used for sending emails in PHP: The PHP function mail() is a built-in function for sending emails in PHP, but it has some limitations and potential drawbacks that make it less popular than other email sending options. We’ll go step-by-step through all of them.
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