Hi,

I had a support request on my plugin regarding this one not adding attachments to CF7 emails beyond the default two. Could you try the following patch which DRYs out your code a little and supports as many messages as exist for that form?

--- a/inc/dnd-upload-cf7.php 	2021-05-17 17:14:26.884043789 +0930
+++ b/inc/dnd-upload-cf7.php	2021-05-17 18:03:19.334104611 +0930
@@ -226,6 +226,22 @@
 		@rmdir( $dir );
 	}
 
+	// Get all active mail properties from a contact form 7 object
+	function dnd_cf7_get_mail_props( $wpcf7 ) {
+		$mail_props = [];
+		$mail_prop_name = 'mail';
+		$mail_prop_n = 2;
+
+		while ( $mail_prop = $wpcf7->prop( $mail_prop_name ) ) {
+			if ( $mail_prop['active'] ) {
+				$mail_props[$mail_prop_name] = $mail_prop;
+			}
+			$mail_prop_name = 'mail_' . $mail_prop_n++;
+		}
+
+		return $mail_props;
+	}
+
 	// Hooks before sending the email - ( append links to body email )
 	function dnd_cf7_before_send_mail( $wpcf7 ){
 		global $_mail;
@@ -257,8 +273,10 @@
 			$links = array();
 
 			// Prop email
-			$mail = $wpcf7->prop('mail');
-			$mail_2 = $wpcf7->prop('mail_2');
+			$mail_props = dnd_cf7_get_mail_props( $wpcf7 );
+			if ( ! $mail_props ) {
+				return $wpcf7;
+			}
 
 			// Default upload path
 			$simple_path = dirname( $upload_path['upload_url'] ); // dirname - remove duplicate form dir (/wpcf-dnd-uploads/wpcf7-dnd-uploads/example.jpg)
@@ -271,26 +289,18 @@
 						// Get posted_data files
 						$files = $submitted['posted_data'][$field->name];
 
-						// Links - 1
-						$mail_links = dnd_cf7_links( $files, $mail['use_html'] );
-						$mail['body'] = str_replace( "[$field->name]", "\n" . implode( "\n", $mail_links ), $mail['body'] );
-
-						// Links - 2
-						if( $mail_2['active'] ) {
-							$mail_links_2 = dnd_cf7_links( $files, $mail_2['use_html'] );
-							$mail_2['body'] = str_replace( "[$field->name]", "\n" . implode( "\n", $mail_links_2 ), $mail_2['body'] );
+						// Links
+						foreach ( $mail_props as &$mail_prop ) {
+							$mail_links = dnd_cf7_links( $files, $mail_prop['use_html'] );
+							$mail_prop['body'] = str_replace( "[$field->name]", "\n" . implode( "\n", $mail_links ), $mail_prop['body'] );
 						}
+						unset($mail_prop);
 					}
 				}
 			}
 
-			// Save the email body
-			$wpcf7->set_properties( array("mail" => $mail) );
-
-			// if mail 2
-			if( $mail_2['active'] ) {
-				$wpcf7->set_properties( array("mail_2" => $mail_2) );
-			}
+			// Save the email bodies
+			$wpcf7->set_properties( $mail_props );
 		}
 
 		return $wpcf7;
@@ -344,17 +354,16 @@
 			return $components;
 		}
 
-		// Get mail,mail_2 attachment [tags]
-		$mail = array('mail','mail_2');
-		$props_mail = array();
-
-		foreach( $mail as $single_mail ) {
-			$props_mail[] = $form->prop( $single_mail );
+		// Get email attachment [tags]
+		$mail_props = dnd_cf7_get_mail_props();
+		if ( ! $mail_props ) {
+			return $components;
 		}
 
-		// Get email attachments (mail, mail_2)
-		$mail = $props_mail[ $_mail ];
-		if( $mail['active'] && $mail['attachments'] ) {
+		// Get email attachments
+		$mail = array_keys( $mail_props );
+		$mail = $mail_props[ $mail[$_mail] ];
+		if( $mail['attachments'] ) {
 
 			// Loop fields get mfile only.
 			foreach( $fields as $field ) {
@@ -1067,4 +1076,4 @@
 		register_setting( 'drag-n-drop-upload-file-cf7', 'drag_n_drop_error_max_file','sanitize_text_field' );
 		register_setting( 'drag-n-drop-upload-file-cf7', 'drag_n_drop_error_min_file','sanitize_text_field' );
 		register_setting( 'drag-n-drop-upload-file-cf7', 'drag_n_drop_disable_btn','sanitize_text_field' );
-	}
\ No newline at end of file
+	}

Thanks,
Roy

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