I am trying to send email via wp_mail containing both - plain text, as well as HTML body.

When I am setting up headers like this:

  $headers = "MIME-Version: 1.0 \r\n";
  //$headers .= "From: Dawid Adach\r\n";
  $headers .= "Reply-To: d.adach@mdbootstrap.com \r\n";
  $headers .= "X-Mailer: PHP/" . phpversion() . "\r\n";

  //$headers .= "To: ".$email."\r\n";
  $headers .= "Content-Type: multipart/alternative;boundary=" . $boundary . "\r\n";

and later on content:

  //Plain text body
  $message .= "Hello,\nThis is a text email, the text/plain version.
  \n\nRegards,\nYour Name";
  $message .= "\r\n\r\n--" . $boundary . "\r\n";
  $message .= "Content-type: text/html;charset=utf-8\r\n\r\n";

  //Html body
  $message .= '
<!--my html comes here -->
  $message .= "\r\n\r\n--" . $boundary . "--";

It doesn't work. The entire body is treated like a plain html. When I check an original message I can see that new line chars aren't interpreted correctly.

Reply-To: d.adach@mdbootstrap.com X-Mailer:PHP/7.0.8Content-Type:
 multipart/alternative@720plan.ovh.net; ,

Second thing is that when I try to set header "From: " wp_mail returns 0 and doesn't send anything.

I was going trough Sending multipart (text/html) emails via wp_mail() will likely get your domain banned , however I cannot overwrite wp_mail function so I have to use original one.

  • "I cannot overwrite wp_mail" why ? explain the special configuration you have if you need help – mmm Aug 29 '16 at 11:05
  • In order to overwrite wp_mail have to put it inside mu-plugin (i.e. "wp-content/mu-plugins/functions.php" ) , as far as I understand I can do it with my local copy, however if I want to provide other users with plugin I cannot overwrite wp_mail. When I am trying to do this from my plugin I am getting error - cannot redeclare wp_mail(). – Dawid Adach Aug 29 '16 at 13:24
  • you can do it in a plugin but only directly in the main file of the plugin, before all actions – mmm Aug 29 '16 at 13:25

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