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What is the advantage of using wp_mail() over mail(). Codex says they're similar, but they seem to be very similar.

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wp_mail() is a pluggable function: It can be replaced by plugins. That’s useful in cases where the regular mail() doesn’t work (good enough), for example when you need extra authentication details. Example: WP Mail SMTP

wp_mail() uses PHPMailer by default, a sophisticated PHP class which offers a lot of useful preprocessing and workarounds for cases where mail() is too simple (UTF-8 encoded subject lines, attachments and so on). Just take a look at the bug tracker to get an idea about the complexity of these tasks.

wp_mail offers some hooks for other plugins to change different values:

  • 'wp_mail'
  • 'wp_mail_from'
  • 'wp_mail_from_name' use case
  • 'wp_mail_content_type'
  • 'wp_mail_charset'
  • 'phpmailer_init' (an action)

In short: Use wp_mail() for interoperability.

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