apply_filters( 'wp_mail_content_type', string $content_type )

Filters the wp_mail() content type.

Contents

Parameters
More Information
Source
Related
- Used By
Changelog
User Contributed Notes

Parameters

$content_type string: Default wp_mail() content type.

More Information

The default content type for email sent through the wp_mail() function is ‘text/plain‘ which does not allow using HTML. However, you can use the wp_mail_content_type filter to change the default content type of the email.
In general, content type is going to be ‘text/plain‘ as the default, or ‘text/html‘ for HTML email; but other MIME types are possible.

Source

File: wp-includes/pluggable.php. View all references

$content_type = apply_filters( 'wp_mail_content_type', $content_type );

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Used By

Used By
Used By	Description
wp_staticize_emoji_for_email() wp-includes/formatting.php	Converts emoji in emails into static images.
wp_mail() wp-includes/pluggable.php	Sends an email, similar to PHP’s mail function.

Changelog

Changelog
Version	Description
2.3.0	Introduced.

User Contributed Notes

11

Contributed by Helen Hou-Sandi — 8 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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Contributed by UrlDev — 1 year ago
Follow the bellow code snippet to set wp_mail(); content type without using add_filter( 'wp_mail_content_type', 'your_function_name' );.

To send HTML formatted mail, you can specify the Content-Type HTTP header in the $headers parameter:
```
$to = 'sendto@example.com';
$subject = 'The subject';
$body = 'The email body content';
$headers = array( 'Content-Type: text/html; charset=UTF-8' );
 
wp_mail( $to, $subject, $body, $headers );
```
That’s all about it. Thank you!
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Contributed by Steven Lin — 2 years ago
Examples migrated from Codex:

The following example will change the default content (mime) type for the wp_mail() function to ‘text/html’:
```
add_filter( 'wp_mail_content_type', 'set_content_type' );

function set_content_type( $content_type ) {
	return 'text/html';
}
```
The following example shows that it is not necessary to call another method if you can use anonymous functions (PHP 5.3.0+):
```
add_filter( 'wp_mail_content_type', function( $content_type ) {
	return 'text/html';
} );
```
The following example shows that you could use different MIME types for different purposes by building some conditional logic into your filter:
```
add_filter( 'wp_mail_content_type', 'my_mail_content_type' );

function my_mail_content_type( $content_type ) {

    if ( $some_condition ) {
        return 'multipart/mixed';
    } else {
        return 'text/plain';
    }
}
```
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Contributed by Steven Lin — 2 years ago
Example migrated from Codex:

If you change the content type to `text/html`, it will cause problems with password reset emails.

To remedy this, consider:
modifying the email body of password reset emails to make it work with ‘text/html‘ content type
OR
reset the content type back to ‘text/plain‘ after you’re done sending the custom emails ( either by explicitly resetting the content type back to ‘text/plain‘ or by removing the callback function filter that changes the content type to ‘text/html‘ with remove_filter() )

The following example shows how to use the filter `retrieve_password_message` to make the email body of password reset emails work with ‘text/html‘ content type:
```
// adding support for html emails
add_filter( 'wp_mail_content_type','mycustom_set_content_type' );

function mycustom_set_content_type() {
        return "text/html";
}

// also filter the password reset email for compatibility with the HTML format
add_filter( 'retrieve_password_message', 'mycustom_retrieve_password_message', 10, 1 );

function mycustom_retrieve_password_message( $message ) {
        $message = str_replace('<','',$message);
        $message = str_replace('>','',$message);
        $message = str_replace("\n",'<br>',$message);
        return $message;
}
```
The following example shows how to reset the content type back to ‘text/plain‘ by removing the callback function filter that changes the content type to ‘text/html‘ with remove_filter() :
```
add_filter( 'wp_mail_content_type', 'set_content_type' );
 
function set_content_type( $content_type ) {
    return 'text/html';
}

remove_filter( 'wp_mail_content_type', 'set_content_type' );
```
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