Why Not Rely on PHP\'s mail() Function for Email Sending?

Why Not Use PHP's mail() Function? Common Flaws and Drawbacks

While the mail() function in PHP might seem like a convenient option for sending emails, it can lead to numerous issues and limitations. It's generally recommended to opt for a library or extension instead.

Key Drawbacks of mail()

• Incorrect Header Formatting: By default, mail() lacks essential headers, such as "From:", "To:", and "Subject:", which can compromise email deliverability or lead to misidentified messages.
• Sendmail Dependency: mail() heavily relies on the sendmail program, which must be installed and properly configured on the server. Misconfigurations or absence of sendmail can hinder email delivery.
• SMTP Restriction: Free email providers like GMX often reject emails sent via mail(), considering them as potential spam. This can result in messages being deleted without notification.

Implications of Flaws

These drawbacks can have significant consequences:

• Emails might not reach intended recipients, leading to communication failures.
• Improper header formatting can result in emails being flagged as spam or ending up in recipients' junk folders.
• Reliance on sendmail introduces potential points of failure, causing intermittent email deliverability issues.
• Blockages by certain ISPs or email providers can severely limit the effectiveness of mail().

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