Edit File by line

<?php

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trait WPCF7_ConfigValidator_Mail {

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/**

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* Replaces all mail-tags in the given content.

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public function replace_mail_tags( $content, $options = '' ) {

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$options = wp_parse_args( $options, array(

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'html' => false,

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'callback' =>

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array( $this, 'replace_mail_tags_with_minimum_input_callback' ),

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) );

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$content = new WPCF7_MailTaggedText( $content, $options );

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return $content->replace_tags();

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}

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/**

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* Callback function for WPCF7_MailTaggedText. Replaces mail-tags with

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* the most conservative inputs.

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public function replace_mail_tags_with_minimum_input_callback( $matches ) {

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// allow [[foo]] syntax for escaping a tag

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if ( $matches[1] === '[' and $matches[4] === ']' ) {

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return substr( $matches[0], 1, -1 );

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}

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$tag = $matches[0];

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$tagname = $matches[2];

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$values = $matches[3];

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$mail_tag = new WPCF7_MailTag( $tag, $tagname, $values );

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$field_name = $mail_tag->field_name();

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$example_email = 'example@example.com';

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$example_text = 'example';

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$example_blank = '';

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// for back-compat

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$field_name = preg_replace( '/^wpcf7\./', '_', $field_name );

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if ( '_site_admin_email' === $field_name ) {

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return get_bloginfo( 'admin_email', 'raw' );

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} elseif ( '_user_agent' === $field_name ) {

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return $example_text;

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} elseif ( '_user_email' === $field_name ) {

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return $this->contact_form->is_true( 'subscribers_only' )

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? $example_email

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: $example_blank;

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} elseif ( str_starts_with( $field_name, '_user_' ) ) {

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return $this->contact_form->is_true( 'subscribers_only' )

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? $example_text

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: $example_blank;

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} elseif ( str_starts_with( $field_name, '_' ) ) {

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return str_ends_with( $field_name, '_email' )

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? $example_email

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: $example_text;

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}

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static $opcalcset = array();

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if ( ! isset( $opcalcset[$this->contact_form->id()] ) ) {

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$opcalcset[$this->contact_form->id()] =

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new WPCF7_MailTag_OutputCalculator( $this->contact_form );

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}

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$opcalc = $opcalcset[$this->contact_form->id()];

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$op = $opcalc->calc_output( $mail_tag );

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if ( WPCF7_MailTag_OutputCalculator::email === $op ) {

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return $example_email;

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} elseif ( ! ( WPCF7_MailTag_OutputCalculator::blank & $op ) ) {

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return $example_text;

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} else {

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return $example_blank;

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}

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}

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/**

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* Runs error detection for the mail sections.

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public function validate_mail( $template = 'mail' ) {

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if (

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$this->contact_form->is_true( 'demo_mode' ) or

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$this->contact_form->is_true( 'skip_mail' )

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) {

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return;

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}

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$components = (array) $this->contact_form->prop( $template );

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if ( ! $components ) {

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return;

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}

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if ( 'mail' !== $template and empty( $components['active'] ) ) {

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return;

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}

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$components = wp_parse_args( $components, array(

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'subject' => '',

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'sender' => '',

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'recipient' => '',

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'additional_headers' => '',

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'body' => '',

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'attachments' => '',

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) );

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$this->validate_mail_subject(

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$template,

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$components['subject']

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);

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$this->validate_mail_sender(

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$template,

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$components['sender']

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);

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$this->validate_mail_recipient(

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$template,

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$components['recipient']

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);

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$this->validate_mail_additional_headers(

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$template,

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$components['additional_headers']

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);

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$this->validate_mail_body(

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$template,

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$components['body']

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);

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$this->validate_mail_attachments(

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$template,

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$components['attachments']

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);

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}

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/**

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* Runs error detection for the mail subject section.

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public function validate_mail_subject( $template, $content ) {

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$section = sprintf( '%s.subject', $template );

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if ( $this->supports( 'maybe_empty' ) ) {

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if ( $this->detect_maybe_empty( $section, $content ) ) {

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$this->add_error( $section, 'maybe_empty',

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array(

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'message' => __( "There is a possible empty field.", 'contact-form-7' ),

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)

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);

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} else {

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$this->remove_error( $section, 'maybe_empty' );

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}

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}

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}

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/**

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* Runs error detection for the mail sender section.

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public function validate_mail_sender( $template, $content ) {

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$section = sprintf( '%s.sender', $template );

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if ( $this->supports( 'invalid_mailbox_syntax' ) ) {

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if ( $this->detect_invalid_mailbox_syntax( $section, $content ) ) {

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$this->add_error( $section, 'invalid_mailbox_syntax',

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array(

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'message' => __( "Invalid mailbox syntax is used.", 'contact-form-7' ),

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)

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);

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} else {

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$this->remove_error( $section, 'invalid_mailbox_syntax' );

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}

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}

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if ( $this->supports( 'email_not_in_site_domain' ) ) {

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$this->remove_error( $section, 'email_not_in_site_domain' );

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if ( ! $this->has_error( $section, 'invalid_mailbox_syntax' ) ) {

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$sender = $this->replace_mail_tags( $content );

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$sender = wpcf7_strip_newline( $sender );

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if ( ! wpcf7_is_email_in_site_domain( $sender ) ) {

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$this->add_error( $section, 'email_not_in_site_domain',

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array(

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'message' => __( "Sender email address does not belong to the site domain.", 'contact-form-7' ),

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)

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);

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}

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}

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}

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}

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/**

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* Runs error detection for the mail recipient section.

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public function validate_mail_recipient( $template, $content ) {

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$section = sprintf( '%s.recipient', $template );

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if ( $this->supports( 'invalid_mailbox_syntax' ) ) {

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if ( $this->detect_invalid_mailbox_syntax( $section, $content ) ) {

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$this->add_error( $section, 'invalid_mailbox_syntax',

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array(

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'message' => __( "Invalid mailbox syntax is used.", 'contact-form-7' ),

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)

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);

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} else {

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$this->remove_error( $section, 'invalid_mailbox_syntax' );

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}

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}

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if ( $this->supports( 'unsafe_email_without_protection' ) ) {

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$this->remove_error( $section, 'unsafe_email_without_protection' );

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if ( ! $this->has_error( $section, 'invalid_mailbox_syntax' ) ) {

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if (

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$this->detect_unsafe_email_without_protection( $section, $content )

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) {

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$this->add_error( $section, 'unsafe_email_without_protection',

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array(

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'message' => __( "Unsafe email config is used without sufficient protection.", 'contact-form-7' ),

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)

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);

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}

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}

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}

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}

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/**

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* Runs error detection for the mail additional headers section.

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public function validate_mail_additional_headers( $template, $content ) {

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$section = sprintf( '%s.additional_headers', $template );

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$invalid_mail_headers = array();

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$invalid_mailbox_fields = array();

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$unsafe_email_fields = array();

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foreach ( explode( "\n", $content ) as $header ) {

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$header = trim( $header );

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if ( '' === $header ) {

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continue;

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}

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$is_valid_header = preg_match(

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'/^([0-9A-Za-z-]+):(.*)$/',

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$header,

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$matches

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);

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if ( ! $is_valid_header ) {

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$invalid_mail_headers[] = $header;

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continue;

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}

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$header_name = $matches[1];

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$header_value = trim( $matches[2] );

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if (

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in_array(

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strtolower( $header_name ), array( 'reply-to', 'cc', 'bcc' )

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) and

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'' !== $header_value and

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$this->detect_invalid_mailbox_syntax( $section, $header_value )

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) {

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$invalid_mailbox_fields[] = $header_name;

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continue;

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}

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if (

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in_array( strtolower( $header_name ), array( 'cc', 'bcc' ) ) and

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$this->detect_unsafe_email_without_protection( $section, $header_value )

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) {

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$unsafe_email_fields[] = $header_name;

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}

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}

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if ( $this->supports( 'invalid_mail_header' ) ) {

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if ( ! empty( $invalid_mail_headers ) ) {

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$this->add_error( $section, 'invalid_mail_header',

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array(

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'message' => __( "There are invalid mail header fields.", 'contact-form-7' ),

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)

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);

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} else {

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$this->remove_error( $section, 'invalid_mail_header' );

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}

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}

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if ( $this->supports( 'invalid_mailbox_syntax' ) ) {

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if ( ! empty( $invalid_mailbox_fields ) ) {

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foreach ( $invalid_mailbox_fields as $header_name ) {

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$this->add_error( $section, 'invalid_mailbox_syntax',

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array(

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'message' => __( "Invalid mailbox syntax is used in the %name% field.", 'contact-form-7' ),

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'params' => array( 'name' => $header_name ),

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)

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);

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}

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} else {

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$this->remove_error( $section, 'invalid_mailbox_syntax' );

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}

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}

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if ( $this->supports( 'unsafe_email_without_protection' ) ) {

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if ( ! empty( $unsafe_email_fields ) ) {

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$this->add_error( $section, 'unsafe_email_without_protection',

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array(

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'message' => __( "Unsafe email config is used without sufficient protection.", 'contact-form-7' ),

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)

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);

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} else {

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$this->remove_error( $section, 'unsafe_email_without_protection' );

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}

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}

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}

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/**

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* Runs error detection for the mail body section.

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public function validate_mail_body( $template, $content ) {

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$section = sprintf( '%s.body', $template );

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if ( $this->supports( 'maybe_empty' ) ) {

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if ( $this->detect_maybe_empty( $section, $content ) ) {

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$this->add_error( $section, 'maybe_empty',

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array(

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'message' => __( "There is a possible empty field.", 'contact-form-7' ),

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)

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);

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} else {

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$this->remove_error( $section, 'maybe_empty' );

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}

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}

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}

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/**

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* Runs error detection for the mail attachments section.

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public function validate_mail_attachments( $template, $content ) {

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$section = sprintf( '%s.attachments', $template );

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$total_size = 0;

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$files_not_found = array();

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$files_out_of_content = array();

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if ( '' !== $content ) {

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$attachables = array();

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$tags = $this->contact_form->scan_form_tags(

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array( 'type' => array( 'file', 'file*' ) )

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);

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foreach ( $tags as $tag ) {

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$name = $tag->name;

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if ( ! str_contains( $content, "[{$name}]" ) ) {

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continue;

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}

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$limit = (int) $tag->get_limit_option();

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if ( empty( $attachables[$name] ) or $attachables[$name] < $limit ) {

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$attachables[$name] = $limit;

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}

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}

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$total_size = array_sum( $attachables );

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foreach ( explode( "\n", $content ) as $line ) {

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$line = trim( $line );

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if ( '' === $line or str_starts_with( $line, '[' ) ) {

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continue;

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}

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if ( $this->detect_file_not_found( $section, $line ) ) {

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$files_not_found[] = $line;

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} elseif ( $this->detect_file_not_in_content_dir( $section, $line ) ) {

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$files_out_of_content[] = $line;

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} else {

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$total_size += (int) @filesize( $path );

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}

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}

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}

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if ( $this->supports( 'file_not_found' ) ) {

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if ( ! empty( $files_not_found ) ) {

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foreach ( $files_not_found as $line ) {

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$this->add_error( $section, 'file_not_found',

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array(

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'message' => __( "Attachment file does not exist at %path%.", 'contact-form-7' ),

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'params' => array( 'path' => $line ),

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)

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);

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}

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} else {

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$this->remove_error( $section, 'file_not_found' );

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}

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}

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if ( $this->supports( 'file_not_in_content_dir' ) ) {

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if ( ! empty( $files_out_of_content ) ) {

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$this->add_error( $section, 'file_not_in_content_dir',

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array(

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'message' => __( "It is not allowed to use files outside the wp-content directory.", 'contact-form-7' ),

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)

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);

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} else {

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$this->remove_error( $section, 'file_not_in_content_dir' );

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}

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}

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if ( $this->supports( 'attachments_overweight' ) ) {

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$max = 25 * MB_IN_BYTES; // 25 MB

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if ( $max < $total_size ) {

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$this->add_error( $section, 'attachments_overweight',

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array(

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'message' => __( "The total size of attachment files is too large.", 'contact-form-7' ),

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)

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);

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} else {

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$this->remove_error( $section, 'attachments_overweight' );

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}

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}

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}

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[445] Fix | Delete

/**

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* Detects errors of invalid mailbox syntax.

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* @link https://contactform7.com/configuration-errors/invalid-mailbox-syntax/

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public function detect_invalid_mailbox_syntax( $section, $content ) {

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$content = $this->replace_mail_tags( $content );

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$content = wpcf7_strip_newline( $content );

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if ( ! wpcf7_is_mailbox_list( $content ) ) {

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return true;

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}

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return false;

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}

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[461] Fix | Delete

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/**

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* Detects errors of empty message fields.

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* @link https://contactform7.com/configuration-errors/maybe-empty/

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public function detect_maybe_empty( $section, $content ) {

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$content = $this->replace_mail_tags( $content );

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$content = wpcf7_strip_newline( $content );

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if ( '' === $content ) {

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return true;

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}

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return false;

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}

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/**

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* Detects errors of nonexistent attachment files.

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* @link https://contactform7.com/configuration-errors/file-not-found/

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[484] Fix | Delete

public function detect_file_not_found( $section, $content ) {

[485] Fix | Delete

$path = path_join( WP_CONTENT_DIR, $content );

[486] Fix | Delete

[487] Fix | Delete

if ( ! is_readable( $path ) or ! is_file( $path ) ) {

[488] Fix | Delete

return true;

[489] Fix | Delete

}

[490] Fix | Delete

[491] Fix | Delete

return false;

[492] Fix | Delete

}

[493] Fix | Delete

[494] Fix | Delete

[495] Fix | Delete

/**

[496] Fix | Delete

* Detects errors of attachment files out of the content directory.

[497] Fix | Delete

[498] Fix | Delete

* @link https://contactform7.com/configuration-errors/file-not-in-content-dir/

[499] Fix | Delete