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   Contributed by Helen Hou-Sandi — 3 years ago

   Switch to HTML formatted email when using wp_mail():

   /**
    * Filter the mail content type.
    */
   function wpdocs_set_html_mail_content_type() {
   	return 'text/html';
   }
   add_filter( 'wp_mail_content_type', 'wpdocs_set_html_mail_content_type' );
   
   $to      = 'sendto@example.com';
   $subject = 'The subject';
   $body    = 'The email body content';
   
   wp_mail( $to, $subject, $body );
   
   // Reset content-type to avoid conflicts -- https://core.trac.wordpress.org/ticket/23578
   remove_filter( 'wp_mail_content_type', 'wpdocs_set_html_mail_content_type' );
   

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